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᠎This Sentence ​‌‌‍​​᠎​​​isn’t Just A Sentence | Hackaday
Some sentences have more than meets the eye, and we’re not talking about interpretive nonsense. Rather, some sentences may contain up to four paragraphs’ worth of hidden text, invisible to readers.

Thanks to Zero Width Obfuscation, it is possible to use Zero Width Characters – Unicode characters that are invisible even when you try to highlight them. They’re typically used for abstract foreign languages that require separators that don’t take up an entire space. In this case, they’re used to obfuscate and de-obfuscate hidden messages sent through text.
encryption  fonts  hackaday  zerowidth 
10 days ago by cyberchucktx
Literal Stretch-Sensing Glove Reconstructs Your Hand Poses | Hackaday
Like many hand-recognition gloves, this “stretch-sensing soft glove” mounts the sensors directly into the glove such that movements can be captured while hands are out of plain sight. However, unlike other gloves, sensors are custom-made from two stretchable conductive layers sandwiched between a plain layer of silicone. The result is a grid of 44 capacitive stretch sensors. The team feeds this datastream into a neural network for gesture processing, and the result is a system capable of reconstructing hand poses at 60Hz refresh rates.
hackaday  glove  gesture  touch  hand 
11 days ago by cyberchucktx
Flying A Batteryless Solar RC Plane
he airframe (named the Solar Bear) is a small lightweight flying wing, with a balsa and carbon fibre frame covered with clear film, with the solar cells housed inside the wing. Since the thrust of the motor is directly proportional to how much sunlight hits the top of wings, it requires the pilot to “tack” against the sun and use momentum to quickly get through turns before orienting into the sun again. If you want to build your own controller, the schematics and software is up on RC Groups.
hackaday  solar  renewable  flight 
13 days ago by cyberchucktx
How To Get Started With Fadecandy And LEDs | Hackaday
The internet is awash with millions of stunning LED projects, and for that, we are all very thankful. For those outside the hacker/maker matrix, it can be difficult to know how to approach such a build. Never fear, for [Amy Goodchild] has put together a beginner’s guide to building pretty glowables, using Fadecandy and Processing.
fadecandy  neopixels  leds  wearables  hackaday 
13 days ago by cyberchucktx
Building A Wind Power Generator In Your Backyard | Hackaday
For a simple version of a VAWT that you can build yourself, [BlueFlower] has published several mechanical drawings that detail the layout of the design.
hackaday  renewables  wind  diy  tutorial 
13 days ago by cyberchucktx
PVC Pipe Turned Portable Bluetooth Speaker | Hackaday
We’ve always felt that sections of PVC pipe from the home improvement store are a criminally underutilized construction material, and it looks like [Troy Proffitt] feels the same way. Rather than trying to entirely 3D print the enclosure for his recently completed portable Bluetooth speaker, he combined printed parts with a piece of four inch pipe from the Home Depot.
audio  pvc  hackaday  tutorial  speaker 
13 days ago by cyberchucktx
Barcode Guitar Plays More Than Beep-Bop | Hackaday
This awesome guitar uses a barcode scanner to play notes, and various arcade controls to manipulate those notes. The barcodes themselves scan as ASCII values, and their equivalent integers are sent to an external MIDI device. This futuristic axe is built on an Arduino Mega, with a USB shield for the barcode scanner, and a MIDI shield on top that [James] connects to various synths in the video after the break.

In between shooting barcodes, the right hand also controls octave shifting and changing MIDI channels with the joystick, and doing pitch-bends with the rotary encoder.
hackaday  music  guitar  barcode  tutorial 
23 days ago by cyberchucktx
Finally, A Rotary Cell Phone With Speed Dial | Hackaday
smartphones are difficult to operate with aging eyes and hands. When [sideburn’s] dad started complaining, he took a different approach. Instead of helping his dad adapt, [sideburn] stuffed modern cell phone guts into a 1970s rotary phone — if all you want to use it for is phone calls, why not reach for a battle-tested handset? Once Rotocell was up and working, he added an SMS interface that makes the phone a lot more useful. Dad can add contacts to Rotocell by texting the name and number to it from a modern phone. Once it’s in there, he can dial by name, speeding up the process a tiny bit. Got an old rotary or two lying about? If modernizing the internals to make calls doesn’t light up your circuits, try turning it into a voice-controlled assistant instead.
phone  telephone  rotary  hackaday  retro 
25 days ago by cyberchucktx
Fighting Household Air Pollution | Hackaday
When Kenyan engineer [Aloise] found out about the health risks of household air pollution, they knew there had to be a smart solution to combatting the problem while still providing a reasonable source of energy for families cooking without the luxury of cleaner fuels. Enter OpenHAP, a DIY household air pollution monitor that provides citizen scientists and researches the means to measure air particulates in developing countries.
openhap  pollution  hackaday  monitor  esp32  climate  environment 
26 days ago by cyberchucktx
Fitness Tracker Hacked Into Optical Density Meter | Hackaday
What do fitness trackers have to do with bacterial cultures in the lab? Absolutely nothing, unless and until someone turns a fitness band into a general-purpose optical densitometer for the lab.
[Chinna Devarapu] learned that as a result of playing around with cheap fitness bands, specifically an ID107HR. A community has built up around hacking these bands; we featured a similar band that was turned into an EEG. With some help, [Chinna] was able to reflash the microcontroller and program it in the Arduino IDE, and began looking for a mission for the sensor-laden platform.

He settled on building a continuous optical densitometer for his biology colleagues.
hackaday  fitness  biology  sensor  sumi 
4 weeks ago by cyberchucktx
Pictorial Guide To The Unofficial Electronic Badges Of DEF CON 27 | Hackaday
DEF CON has become the de facto showplace of the #Badgelife movement. It’s a pageant for clever tricks that transform traditional green rectangular circuit boards into something beautiful, unique, and often times hacky.

Today I’ve gathered up about three dozen badge designs seen at DC27. It’s a hint of what you’ll see in the hallways and meetups of the conference. From hot-glue light pipes and smartphone terminal debugging consoles to block printing effects and time of flight sensors, this is a great place to get inspiration if you’re thinking of trying your hand at unofficial badge design.
badge  hackaday  wearables 
4 weeks ago by cyberchucktx
iF°EVE Thermometer | Hackaday.io
iFIVE is the worlds first intelligent fever thermometer that can classify if you caught a cold or have a life-threatening flu by measuring your body temperature and asking you a couple of simple questions, using Naive Bayes classifiers, which are commonly used in automatic medical diagnosis, beside of other mathematical technics.
sumi  medical  diy  thermometer  diagnostic  hackaday  flu 
4 weeks ago by cyberchucktx
Superbly Synchronized Servos Swaying Softly | Hackaday
LEDs and blinky projects are great, and will likely never fade from our favor. But would you look at this sweeping beauty? This mesmerizing display is made from 36 micro servos with partial Popsicle sticks pasted on the arms. After seeing a huge display with 450 servos at an art museum, [Doug Domke] was inspired to make a scaled-down version.
servos  art  hackaday  performance 
4 weeks ago by cyberchucktx
Street Sense: Portable electronic device to measure air and noise pollution @ Hackaday.io
Street Sense is a project to build a portable, battery-powered sensor unit to measure:

Air Quality: Ozone, NO2, Particulates
Noise Pollution
Environment: Temperature, Humidity

There are two NGO sponsors.

The project name "Street Sense" seems appropriate - sensing the environment at the street level in the urban landscape
hackaday  project  diy  environment  monitoring  sensors  air 
5 weeks ago by cyberchucktx
FieldKit | Hackaday.io
FieldKit is an open-source software and hardware platform that allows individuals and organizations to collect and share field-based research data, and to tell stories through interactive visualizations. Designed to be easy to deploy customizable, FieldKit can be adapted to meet the needs of diverse research teams, from biology and ecology to marine and environmental sciences, from post-doc researchers to elementary school students. FieldKit offers a simple platform for enabling live data expeditions, and for the creation and deployment of environmental sensor networks or in situ monitoring.
hackaday  fieldkit  environmental  sensor  project 
5 weeks ago by cyberchucktx
3D printed prosthesis with CV, BCI and EMG | Hackaday.io
This is a transhumeral prosthesis I have built to help a congenital limb deficiency patient in my country. The prosthesis is equipped with computer vision (object recognition and object tracking) to support wrist movement and choosing best grip patterns for object handling. The prosthesis is also equipped with a simple brain-computer interface and myoelectric sensor so that user could control the prosthesis at will, or give consent to the actions chosen by the prosthesis.
prosthetic  medical  sumi  hackaday 
5 weeks ago by cyberchucktx
uECG - a very small wearable ECG | Indiegogo
Everyone who's been to a hospital is familiar with ECG machines, with their many leads and electrodes. However, what we found is that ECG should not necessarily come in a large package to be useful - and neither it has to be expensive and difficult to use.

No wires, no leads - uECG comes with two button connectors that you can use with ordinary wet electrodes. Stick it to your chest, flip the switch, tap your phone and see your ECG, real time. Just like this:
indiegogo  diy  ecg  wearable  sumi  hackaday 
5 weeks ago by cyberchucktx
DIY Watertight Junction Box For Serious Outdoor Sealing | Hackaday
Thingiverse user [The-Mechanic] shared a design for 3D printed enclosures that are made to house wire and cable junctions, which can then be rendered weatherproof by injecting them with a suitable caulking compound and allowing it to cure. It’s a cross between an enclosure and potted electronics. It’s also a one-way trip, because the result is sealed up like a pharaoh’s tomb. On the upside, it’s cheap, accessible, and easily customized.
hackaday  case  box  water  watertight 
5 weeks ago by cyberchucktx
Norovirus Smartphone: Using Megapixels And Microfluidics To Fight The Other Kind Of Virus Infection | Hackaday
Most of the 685 million norovirus infections each year resolve after a few miserable days, but some require hospitalization and 200,000 of them result in death, mainly from dehydration and mainly children. An easy to use, cheap, and accurate means of detecting the virus in the field would be quite a boon to public health. And soon, smartphones may be able to do just that. To solve the problem of rapidly identifying norovirus in real-world conditions, a team at the University of Arizona has developed a unique microfluidics virus detection method. The idea is similar to the “sandwich” immunoassay used in the lab, but with a few twists.
hackaday  medical  sumi  diy  diagnostics  virus 
5 weeks ago by cyberchucktx
Reading The Water Meter In A Literal Sense With An ESP8266 | Hackaday
One popular project is to collect data about their home energy or water consumption to try and identify any trends or potential inefficiencies. For safety and potentially legal reasons, this usually has to be done in a minimally invasive way that doesn’t compromise the metering done by the utility provider. As you might expect, that often leads to some creative methods of data collection.

The latest solution comes courtesy of [Keilin Bickar], who’s using the ESP8266 and a serial TTL camera module to read the characters from the LCD of his water meter. With a 3D printed enclosure that doubles as a light source for the camera, the finished device perches on top of the water meter and sends the current reading to HomeAssistant via MQTT without any permanent wiring or mounting.
hackaday  water  meter  arduino  esp8266  embedded  homeautomation 
6 weeks ago by cyberchucktx
Energy Harvesting | Hackaday
Growing Hackaday section on energy harvesting for embedded projects.
hackaday  sumi  energy  energyharvesting  blog  collection 
6 weeks ago by cyberchucktx
Slim Band: Appetite Suppression Wristband | Hackaday.io
Obesity today is a huge problem with very few practical solutions. 40% of the world is considered overweight and 650 million are obese. This project is to produce a low cost, effective wearable to change peoples eating habits and help stop overeating. The wearable is a simple wristband with a settable countdown timer and an appetite suppression supplement. The user simply starts the timer at the start of a meal and when the timer beeps you stop eating and take an appetite suppression mint.
wearable  hackaday  tutorial  watch  obesity  eating  sumi 
6 weeks ago by cyberchucktx
FiberGrid: An Inexpensive Optical Sensor Framework | Hackaday
The idea is simple: make your sensors from light gates using fiber optics, feed the ends of the plastic fibers into a grid, then film the grid with a camera. After calibrating the software, built with OpenCV, you can “sample” the sensors through a neat abstraction layer. This approach is easier and cheaper than you might think and makes it very easy to add new sensors.
hackaday  hardware  connectors  optical 
7 weeks ago by cyberchucktx
3D printable bearing generator | Hackaday.io
Many hobbyist face the problem of needing some bearings that are lightweight and cheap enough for their applications. However, more times than not, the available sizes don´t match your application or they are to much of an overkill to be used. To solve these issues I decided to develop a Fusion 360 script which generates bearings depending on your input parameters.
3dmodel  3dprinting  ballbearing  hackaday 
7 weeks ago by cyberchucktx
Everything You Want To Know About The Cheapest Processors Available | Hackaday
Those of us who use microprocessors in our work will be familiar with their cost, whether we are buying one or two for a project or ten million on reels for a production run. We’re used to paying tens of cents or maybe even a dollar for a little microcontroller in single quantities, and these are probably the cheapest that we might expect to find.

There is a stratum of cheaper devices though, usually from Chinese manufacturers with scant data in English and difficult to source in Europe or the Americas. These chips cost under ten cents each, a figure which seems barely credible. To shed some light upon this world, [cpldcpu] has produced a run-down of some of the available families that even if you will never work with such an inexpensive option still makes for a fascinating read.
hackaday  microcontroller  article  cheap 
7 weeks ago by cyberchucktx
Conductive Origami Lights Up Your Life | Hackaday
Conductive origami, which in this case allows for light fixtures that turn themselves on as they are unfolded.
hackaday  fabric  etextiles  led  lighting 
8 weeks ago by cyberchucktx
Be Better Bracelet | Hackaday.io
A simple, subtle wearable that can reinforce positive habits and track progress on stopping bad habits. I wanted something straightforward and unobtrusive. So, I decide to build a small wearable that could go in a bracelet, or a keychain, or in my pocket. The device would be simple. One click will record an event. Data would sync to an app to give me status on trends, progress, and rewards.
hackaday  bracelet  wearable  momentship 
8 weeks ago by cyberchucktx
OTA Flash Tool Makes Fitness Tracker Hacking More Accessible | Hackaday
Over the last several months, [Aaron Christophel] has been working on creating a custom firmware for cheap fitness trackers. His current target is the “D6 Tracker” from a company called MPOW, which can be had for as little as $7 USD. The ultimate goal is to make it so anyone will be able to write their own custom firmware for this gadget using the Arduino IDE, and with the release of his new Android application that allows wirelessly flashing the device’s firmware, it seems like he’s very close to realizing that dream.
bluetooth  wireless  fitness  hackaday  health  wearable  sumi 
8 weeks ago by cyberchucktx
Machine Learning: Foundations | Hackaday
When you want a computer to do something, you program it. However, there are ways to make computers learn, at least in some situations. One technique that makes this possible is the perceptron learning algorithm. A perceptron is a computer simulation of a nerve, and there are various ways to change the perceptron’s behavior based on either example data or a method to determine how good (or bad) some outcome is.
hackaday  machinelearning  ai  artificialintelligence  deeplearning 
8 weeks ago by cyberchucktx
The Badgies: Clever, Crazy, And Creative Ideas In Electronic Design | Hackaday
Engineering creativity comes to life when you have to design around a set of constraints. We can do just about anything with enough time, talent, and treasure, but what can you do when shackled with limitations? Some of the most creative electronic manufacturing tricks spring to life when designing conference badges, as the ability to built multiples, to come in under budget, and most importantly to have the production finished in time are all in play. This happens at conferences throughout the year and all over the globe, but the highest concentration I’ve seen for these unique pieces of art is at DEF CON every year. I
badge  hackaday  badgies  wearables 
8 weeks ago by cyberchucktx
Queercon 16 Hardware Badge
This year, there are two hardware badges produced by the team composed of Evan Mackay, George Louthan, and Subterfuge. The one shown here is nicknamed the “Q” badge for its resemblance to the letter. Both get you into the conference, both are electronically interactive, but this one is like a control panel for an alternate reality game (ARG) that encourages interactivity and meaningful conversations.
hackaday  badge  wearable 
9 weeks ago by cyberchucktx
PaperLedger: An E-Ink Cryptocurrency Ticker | Hackaday
A perfect example is PaperLedger, an entry into the 2019 Hackaday Prize by [AIFanatic]. This wireless device is designed to display the current price of various cryptocurrencies on its 2.9-inch e-ink screen and provide audible price alerts with its built-in speaker. It even has a web portal where users can configure the hardware or view more in-depth price information.
hackaday  tindie  esp32  arduino  embedded  epaper  audio 
9 weeks ago by cyberchucktx
ESP8266 Controls TiVo Over The Network | Hackaday
while the TiVo may no longer be the centerpiece of the average home entertainment center, there’s a diehard group of antennaed aficionados that are still rocking (and hacking) them.

One such TiVotee is [Thomas McQueen], who recently discovered his TiVo-powered Virgin Media V6 DVR was listening for commands on the network. After finding some official documentation for the protocol and firing off a couple of test commands from his computer’s telnet client, he realized he had an opportunity to flex his microcontroller muscle and create a library that would allow controlling the set-top box with the ESP8266 or other network-capable MCU.
hackaday  tivo  homeautomation  hometheater 
9 weeks ago by cyberchucktx
Forming Fipples And Accompanying Accoutrements | Hackaday
Dr. Suess] created memorable books with minimal words and bright artwork. He inspired children and adults alike, and one of them, [Len], grew up to create wind instruments for the Bellowphone channel on YouTube. Behind the whimsy of his creations is significant engineering, and this time, we get to see the construction of a fipple. Even though fipple sounds like a word [Dr. Suess] would have coined, it is a legitimate musical term that means a whistle-like mouthpiece. In this case, it blows air across glass jars to create the sound for [Len]’s bottle organ. Check out the second video below for a performance from The Magic Flute.
hackaday  fipple  music  instrument 
10 weeks ago by cyberchucktx
1btn: Open Source WiFi connected IoT Button | Hackaday.io
1btn (one button) uses the internet to complete a task with the simple, satisfying click of a single button. It connects to the internet over WiFi to trigger whatever action you have assigned to it using a simple, online interface. One click, one task. It’s that simple.

Unlike many other “Internet of Things” devices, 1btn does not maintain a continuous connection to the internet. Instead, it sleeps until pressed, then it connects to the internet, performs the assigned task, tells you the outcome via its multi-colored LED, and then returns to rest.
momentship  wifi  button  hackaday  wearable  wireless 
10 weeks ago by cyberchucktx
Make Your Own Flexible Panel Lights | Hackaday
To build the flexible panel, the LED strips are glued onto a fake leather backing pad, which is then given a steel wire skeleton to enable it to be bent into various shapes. Leather loops are built into each corner of the panel as well, allowing the light to be fitted to a stand using a flexible aluminium bracket. The LEDs are slightly under-volted to help them last longer and enable them to run from a laptop power supply.
hackaday  leds  panel  flexible 
11 weeks ago by cyberchucktx
Homebrew Pancreas Gets 30 Minutes Of Fame | Hackaday
It is pretty unusual to be reading Bloomberg Businessweek and see an article with the main picture featuring a purple PCB (the picture above, in fact). But that’s just what we saw this morning. The story is about an open source modification to an insulin pump known as the RileyLink. This takes advantage of older Medtronic brand insulin pumps and allows you to control the BLE device from a smartphone remotely and use more sophisticated software to control blood sugar levels.

Of course, the FDA isn’t involved. If they were, the electronics would cost $7,000 instead of $250 — although, in fairness, that $250 doesn’t cover the cost of the used pump. Why it has to be a used pump is a rather interesting story. The only reason the RileyLink is possible is due to a security flaw and an active hacker community.
hackaday  insulin  pump  hardware  diy  sumi 
11 weeks ago by cyberchucktx
CPAP Monitor Alerts Wearer To Malfunctions | Hackaday
Continuous Positive Airway Pressure machines are a common treatment tool for sleep apnea and other respiratory issues. A common problem with their use is that the mask becomes dislodged during sleep, and thus fails to provide airway pressure to the patient. [Bin Sun] decided to take a stab at solving this problem.

The project consists of an Arduino fitted with a MPXV7002DP pressure sensor.
hackaday  medical  diagnostic  cpap  diy  arduino  sumi 
11 weeks ago by cyberchucktx
A Look At The Basics Of Building An Arduino Watch | Hackaday
Miniaturization has made smart watches possible, even for the DIY maker to tinker with. For those just getting to grips with basic digital electronics, it can be daunting, however. For those just starting out, [陳亮] put together a handy guide to building the core of an Arduino-based watch.
wearable  watch  arduino  hackaday 
11 weeks ago by cyberchucktx
Magic Wand Learns Spells Through Machine Learning And An IMU | Hackaday
Jennifer Wang likes to dress up for cosplay and she’s a Harry Potter fan. Her wizarding skills are technological rather than magical but to the casual observer she’s managed to blur those lines. Having a lot of experience with different sensors, she decided to fuse all of this together to make a magic wand. The wand contains an inertial measurement unit (IMU) so it can detect gestures. Instead of hardcoding everything [Jennifer] used machine learning and presented her results at the Hackaday Superconference. Didn’t make it to Supercon? No worries, you can watch her talk on building IMU-based gesture recognition below, and grab the code from GitHub.
hackaday  harrypotter  embedded  machinelearning 
12 weeks ago by cyberchucktx
MQTT Deep Dive | Hackaday
If you read Hackaday, it is a good bit you’ve heard of MQTT — Message Queueing Telemetry Transport. If you’ve not used MQTT before, you should check out Ably’s [Kayla Matthews’] post entitled MQTT: A Conceptual Deep Dive paper. She does mention their MQTT protocol connector at the end, and has a few notes about Ably’s products, but most of the post is a normal white paper and has a lot of good info.

MQTT’s claim to fame, of course, is that it is very tiny and is made to minimize power consumption compared to heavier-weight protocols. When you are trying to provide or consume data from a device that has to last a year on a coin cell, MQTT is your friend.
hackaday  mqtt  tutorial  crossplatform  embedded 
12 weeks ago by cyberchucktx
Brain-Computer Interfaces: Separating Fact From Fiction On Musk’s Brain Implant Claims | Hackaday
And now there’s this Elon Musk guy, proclaiming that he’ll be wiring up people’s brains to computers starting next year, as part of this other company of his: Neuralink. Here the promises and imaginings are truly straight from the realm of sci-fi, ranging from ‘reading and writing’ to the brain, curing brain diseases and merging human minds with artificial intelligence. How much of this is just investor speak? Please join us as we take a look at BCIs, neuroprosthetics and what we can expect of these technologies in the coming years.
hackaday  bci  brain  eeg  neural 
12 weeks ago by cyberchucktx
3D Printed Prosthesis Tracks Objects, Moves Smoothly | Hackaday
Hobbyist electronics and robotics are getting cheaper and easier to build as time moves on, and one advantage of that is the possibility of affordable prosthetics. A great example is this transhumeral prosthesis from [Duy], his entry for this year’s Hackaday Prize.

Side views of the 3D printed prosthesis arm.With ten degrees of freedom, including individual fingers, two axes for the thumb and enough wrist movement for the hand to wave with, this is already a pretty impressive robotics build in and of itself. The features don’t stop there however. The entire prosthesis is modular and can be used in different configurations, and it’s all 3D printed for ease of customization and manufacturing. Along with the myoelectric sensor which is how these prostheses are usually controlled, [Duy] also designed the hand to be controlled with computer vision and brain-controlled interfaces.
prosthetics  3dprinting  hackaday  medical  sumi 
july 2019 by cyberchucktx
Tomography Through An Infinite Grid Of Resistors | Hackaday
One of the vast untapped potentials of medicine is the access to imaging equipment. A billion people have difficulty getting access to an x-ray, and that says nothing about access to MRIs or CAT scans. Over the past few years, [Jean Rintoul] has been working on a low-cost way to image the inside of a human body using nothing more than a few electrodes. It can be done cheaply and easily, and it’s one of the most innovative ways of bringing medical imaging to the masses. Now, this is a crowdfunding project, aiming to provide safe, accessible medical imaging to everyone.

It’s called Spectra, and uses electrical impedance tomography to image the inside of a chest cavity, the dielectric spectrum of a bone, or the interior of a strawberry. Spectra does this by wrapping an electrode around a part of the body and sending out small AC currents. These small currents are reconstructed using tomographic techniques, imaging a cross-section of a body.
sumi  tomography  spectra  opensourcd  hackaday  mri  medical  biomedical  imaging 
july 2019 by cyberchucktx
Open electric drive kit for wheelchairs - alpha v | Hackaday.io
A few years ago I learned through Simon Merrett about a charity, Remap UK, where volunteers adapted things to be used by people with some form of impairment. He noted that there was a lack of information online about how an electric wheelchair would be designed (e.g. drive system, control, etc). This led me to publish a short report analysing the kinematics of a mousebot (https://hackaday.io/project/21343-control-of-a-vehicle-with-two-driving-wheels). The present page is a follow-up project done by a group of 3rd year students from Electrical and Electronic Engineering at Imperial College where they built a first prototype of an electric wheelchair that will be the basis for future development of an open kit to build electric wheelchairs for cheap. The idea is to keep information open and make the system suitable to use off-the-shelf components.
wheelchair  hackaday  disabled  transportation 
july 2019 by cyberchucktx
Do You Have An Endangered Craft? | Hackaday
The Industrial Revolution brought mechanisation and mass production, and today very few of the products you use will be hand-made. There may still be a few craftsmen with the skills to produce them by hand, but in the face of the mass-produced alternative there is little business for them and they are in inevitable decline. In an effort to do something about this and save what skills remain, the Heritage Crafts Association in the UK has published a list of dying crafts, that you can view either alphabetically, or by category of risk.
hackaday  crafts  craft  maker  makermovement  tools  skills 
july 2019 by cyberchucktx
Linux Fu @ Hackaday
Category/collection of Linux Fu (tips & tricks) at Hackaday
hackaday  reference  linux  sysadmin  scripting 
july 2019 by cyberchucktx
LoRaSleeve | Hackaday.io
A wearable ESP32 based hardware that can connected to a smartphone/PC and allows it to communicate with other device with similar hardware. Communication between the hardware and Smartphone/PC is via BLE. Sub-stations/Routers Could be introduced if needed.
lora  lorawan  hackaday  project  wireless  communications  networking  mobile  phone 
july 2019 by cyberchucktx
Learning About Wearable Engineering While Trying To Un-Taboo A Topic | Hackaday
During her Hackaday Superconference talk Sarah Petkus discusses her latest project that uses wearable technology to sense and react to her own body. She Bon is reminiscent of the French for “so good” and is a project whose aim transcends the technical challenges. Sarah uses engineering as a way to facilitate adults having healthy dialogs with one another about sex.

Depending on your profession, this discussion is likely not appropriate for work — it’s not sexual, but it’s fundamentally about sex — so don’t click through the video without thinking twice. But we respect Sarah’s courage for leading a project that wants to make sure there actually are places where it is possible to have these conversations and a way to get them started.
hackaday  wearables  body  medical  sensuality 
july 2019 by cyberchucktx
MoAgriS: A Modular Agriculture System | Hackaday
Hackaday.io user [Prof. Fartsparkle] aims to impress us again with MoAgriS, a stripped-down rig for bringing crops indoors and providing them with all they need.

This project is an evolution of their submission to last year’s Hackaday Prize, MoRaLiS — a modular lighting system on rails — integrating modules for light, water, airflow, fertilizer and their appropriate sensors. With an emphasis on low-cost, a trio of metal bars serve as the structure, power and data transmission medium with SAM D11 chips shepherding each plant.
gardening  robotics  hackaday  automation  farming  agriculture 
july 2019 by cyberchucktx
Autonomous Agribots For Agriculture | Hackaday
For his Hackaday Prize entry, [TegwynTwmffat] is going all-in on autonomous robotics. No, it’s not a self-driving car with highly advanced features such as cruise control with lane-keeping. This is an autonomous robot that’s capable of driving itself. It’s a robot built for agriculture, and relative to other autonomous robotics projects, this one is huge. It’s the size of a small tractor.

The goal [Tegwyn]’s project is to build a robot capable of roving fields of crops to weed, harvest, and possibly fertilize the land. This is a superset of the autonomous car problem: not only does [Tegwyn] need to build a chassis to roll around a field, he needs accurate sensors, some sort of connection to the Internet, and a fast processor on board
hackaday  robotics  agriculture  autonomous 
july 2019 by cyberchucktx
Robot Harvesting Machine Is Tip Of The Agri-Tech Iceberg | Hackaday
Harvesting delicate fruit and vegetables with robots is hard, and increasingly us humans no longer want to do these jobs. The pressure to find engineering solutions is intense and more and more machines of different shapes and sizes have recently been emerging in an attempt to alleviate the problem. Additionally, each crop is often quite different from one another and so, for example, a strawberry picking machine can not be used for harvesting lettuce.

A team from Cambridge university, UK, recently published the details of their lettuce picking machine, written in a nice easy-to-read style and packed full of useful practical information. Well worth a read!
robotics  farming  agriculture  hackaday 
july 2019 by cyberchucktx
Soak Up The Sun With This 3D Printed Solar Harvester | Hackaday
f you’re looking to power small electronic devices such as sensors with a single solar panel, [Vadim Panov] has put together a very concise write-up and video on building a low-cost solar harvester. It combines a relatively small photovoltaic panel, a charging circuit, and a battery for energy storage into a easily mountable package. He’s provided all the details necessary to create your own version.
hackaday  solar  3dprinted  3dmodel 
july 2019 by cyberchucktx
PTPM Energy Scavenger | Hackaday.io
PTPM energy scavenger is designed as platform that can be easily adapted to vast range of environmental sensing applications. Heart of the platform is energy scavenging module that can harvest energy from photovoltaic, thermoelectric, piezoelectric and magnetic induction sources.
hackaday  energy  harvesting  energyharvesting  power  green 
july 2019 by cyberchucktx
This Super Realistic LED Candle Is Smoking Hot | Hackaday
So what did [Keith] put into his ultimate LED candle? In the most basic form, the electronics consist of a Arduino Pro Mini and a chunk of RGB WS2812B strip holding six LEDs. Add in an IR sensor if you want the candle to be able to detect the presence of a match, and a microphone if you want to be able to blow into the candle to turn it off. Things only get tricky if you want to go full smoke, and let’s be honest, you want to go full smoke.

To safely produce a puff of fragrant smoke, [Keith] is using a coil of 28 gauge wire wrapped around the wick of a “Tiki Torch”, and a beefy enough power supply and MOSFET to get it nice and hot.
hackaday  candle  led  tutorial  arduino 
july 2019 by cyberchucktx
Piezoresistive sensor matrix | Hackaday.io
The motivation for this project comes from a student in one of my classes, Chris, who has an amputation below the knee and wears a prosthetic. Chris's prosthetic often becomes painful, requiring visits to a specialist to adjust the fit. Often these adjustments do not resolve the issue, requiring more visits. As a result, Chris had developed a one channel pressure sensor application on a breadboard that provided quantitative information about the amount of pressure. When Chris showed me this device, I told him that, while it was awesome, I thought that we could do better.
hackaday  sensor  piezoresistive  pressure  prosthetic  medical  sumi 
june 2019 by cyberchucktx
New 3D Printing Technique – Friction Welding | Hackaday
“Friction welding” is the process of rubbing two surfaces together until the friction alone has created enough heat to join them. Industrially, the method is applied to joining large, metal workpieces that would otherwise require a time-consuming weld. That is all there is to it. Snip off a bit of filament, feed it into your rotary tool, and run a bead to join parts and shapes or do repairs. Friction welded plastic is shockingly strong, vastly superior to glued plastic for some joints. Another tool for the toolbox.
3dprinting  welding  repair  hackaday 
june 2019 by cyberchucktx
Magic Record Stand Can Play Your Records For You | Hackaday
[sp_cecamp] has come up with a great way to experience your collection, with the magic of modern technology. It goes by the name of Plynth.

Fundamentally, it’s a small record stand with an excellent party trick. The prototype consists of a 3D-printed body, which holds a record sleeve at an attractive angle for display. A camera built into the base then images the artwork. The first image taken is run through the Google Vision API, and further images are then run through OpenCV to identify the record. This data is then passed to the Spotify API to play the track. The whole process takes a couple of seconds, and the music is then pumped out of whatever streaming device is connected to the rig.
hackaday  imageprocessing  recognition  music 
june 2019 by cyberchucktx
Captivating ESP32 Camera Hack | Hackaday
You can never have enough DIY devices at home, so when you look at an ESP32 module that comes with the camera, you automatically start getting ideas. [Daniel Padilla] wanted a way to deploy DIY camera modules without the hassle of configuring them so he made one that looks like an access point and starts streaming as soon as you connect to it.
hackaday  camera  esp32  wifi 
june 2019 by cyberchucktx
BikeOn | Hackaday.io
Convert your bicycle to electric in seconds. No tools or skills required.
bike  hackaday  bicycle  electric  green 
june 2019 by cyberchucktx
Designing A Drone To Fire From A Grenade Launcher | Hackaday
You might think that tiny autonomous drones that can be fired out of a standard 40 mm grenade launcher for rapid deployment would be the kind of thing the military would love to get their hands on. Which is true, of course, and a number of companies are working on the idea for police and military applications. But [Glytch] thinks the technology could also be used for search and rescue operations, so he’s working on creating a version for us civilians.
hackaday  drones 
june 2019 by cyberchucktx
Boxes.py @ Hackaday.io
An (Online) Box Generator for laser cutters, written in Python. Available in a web-based version that prompts for parameters.
hackaday  python  laser  boxes  parametric  project 
june 2019 by cyberchucktx
blinky projects @ Hackaday.io
Blinky project collection (LEDS mostly) at Hackaday. Includes neopixel-based wearables and other display projects.
hackaday  led  blinky  projects 
june 2019 by cyberchucktx
Artistic Attempt To Send Digital Signals Via Fungus | Hackaday
Liquids are applied to change the pH of the system, which can be picked up at the other end of the soil bed. The pH levels are read as digital signals, with pH levels either side of neutral reading as high and low bits. pH sensors can be expensive, so [Julian] chose the cheapest available, and tapped into their LCD display lines to read their output into an microcontroller. The system displays data using commonly available OLED displays, and hobby servo motors are used to control the dispensing of liquid.

Due to time constraints, [Julian] was unable to get the system fully functional. Sending data as pH levels through fungus proved unreliable and slow, but we suspect with further development, the system could be improved.
art  hackaday  project  biology 
june 2019 by cyberchucktx
Hatchery for badge.team @ Hackaday
Collection of hardware/software for badges at various tech conferences. All open source, most arduin-based.
badge  software  hackaday  arduino 
june 2019 by cyberchucktx
Ferrofluid Display Fuels the Fun, and the Procrastination | Hackaday
When deadlines loom and your future is on the line, do what top college students through the ages have always done: procrastinate! [Simen] and [Amund] did that in grand style by starting a YouTube channel, delightfully and aptly named “Applied Procrastination”, wherein they plan to avoid their responsibilities as long as possible in favor of making a large-scale ferrofluidic display panel. (Video, embedded below.)
hackaday  display  ferrofluid 
may 2019 by cyberchucktx
The DIYson, an open source Cyclone vacuum cleaner | Hackaday.io
Ever wanted one of those fancy cyclone vacuum cleaners, battery powered and with a nice design? Don't you feel like you're about to spend 200-300 euros for a brand new one? This is how the DIYson started: to benefit from 3d design, 3d printing, and the availability of economic parts made for RC models, to create the first Open source cyclone vacuum cleaner.
diy  appliance  vacuum  hackaday  diyson  dyson 
may 2019 by cyberchucktx
Raspberry Pi Zero as a USB Stick | Hackaday
The Raspberry Pi Zero is small enough that it could almost be mistaken for a USB gadget, rather than a standalone computer. Maybe that was the inspiration that drove [Novaspirit] to completely “donglify” his Zero.

This is a great convenience hack if you’ve got a Zero just kicking around. With minimal soldering, he converted the Zero’s onboard female USB jacks into a male USB plug. From there on out, it’s all software, and the video (embedded below) takes you through all the steps on Windows.
raspberrypi  zero  usb  hackaday 
may 2019 by cyberchucktx
Coagulator Kit - Season 3 & 4 | Hackaday.io
Our mission is to empower students who want to make a difference in this world by giving them the tools to tackle real-world water issues collaboratively.

The program and curriculum is entirely free and we are crowd sourcing funds to give away kits to teams that need them all over the world. New teams are given an introductory lesson from our partner A&M University curriculum via these explore books. http://texas4-h.tamu.edu/wp-content/uploads/explore_waterguide_electro_cooagulation_july2018.pdf
water  coagulator  hackaday 
may 2019 by cyberchucktx
Affordable Exoskeleton Arm (ExoArm) | Hackaday.io
So when I was 15, I had big plans on making an exoskeleton arm that would help her. I had a notebook filled with sketches and designs (I turned whole house upside down to find it but I think it's lost) of the ExoArm using buttons and no microcontroller. Good times.

Now that I'm older, I have a new goal. The goal is that people who can't afford to buy those expensive exo-arms, have a chance of making one by themselves. From scratch, with little to no money.
hackaday.io  hackaday  exoskeleton  robotics  transhuman  wearable 
may 2019 by cyberchucktx
New Part Day: Lynxmotion Smart Servos | Hackaday
Anyone who shops for robotics kits would have come across a few designed by Lynxmotion. They’ve been helping people build robots since 1995, from robot arm kits to hexapod chassis and everything in between. We would expect these people know their motors, so when they launched their own line of servo motors called Lynxmotion Smart Servos (LSS). Digging into product documentation found some great details. Acceleration and deceleration rates are adjustable, which can help with smoother robot movement. There’s also an adjustable level of “stiffness” that adds some “give” (compliance) so a robot won’t have to be as stiff as… well, a robot!

Mechanically, the most interesting internal component is the magnetic position sensor. They are far more precise than potentiometers, but more importantly, they allow positioning anywhere within full 360 degrees. Many other serial bus servos are constrained to positions within an arc less than 360 degrees leaving a blind spot.
hackaday  servos  hardware 
may 2019 by cyberchucktx
The cloak of invisibility against image recognition | Hackaday
Adversarial attacks are not something new to the world of Deep Networks used for image recognition. However, as the research with Deep Learning grows, more flaws are uncovered. The team at the University of KU Leuven in Belgium have demonstrated how, by simple using a colored photo held near the torso of a man can render him invisible to image recognition systems based on convolutional neural networks. In this new paper, the addition of color patches is seen to confuse the image detector YoLo(v2) by adding noise that disrupts the calculations of the CNN. The patch is not random and can be identified using the process defined in the publication.

This attack can be implemented by printing the disruptive pattern on a t-shirt making them invisible to surveillance system detection.
hackaday  imageprocessing  recognition  invisibility  security  privacy 
may 2019 by cyberchucktx
Raspberry Pi Becomes The Encrypted Password Keeper You Need | Hackaday
Unless you’re one of the cool people who uses the same password everywhere, you might be in need of a hardware device that keeps your usernames and passwords handy. The Passkeeper is a hardware password storage system built on a Raspberry Pi. It encrypts your passwords, and only through the magic of a special key fob will you ever get your passwords out of this device.
security  password  raspberrypi  encryption  hackaday 
april 2019 by cyberchucktx
OpenGL Shaders And An LED Cube | Hackaday
Polyfloyd] had equipped his LED cube with OpenGL shaders to map arbitrary images to the cube’s pixels in 3D space. Driver software comes from an open-source library round which he’s put a wrapper allowing input through a UNIX pipe. This can take the RGB output of an OpenGL shader, of which he has created both 2D to 3D and spherical projection versions. The must-see demo is a global map of light pollution, and the result is a rather impressive piece of work.
hackaday  opengl  display  led 
april 2019 by cyberchucktx
Reverse Engineering An Insulin Pump With An SDR And Decapping | Hackaday
Insulin pumps are a medical device used by people with diabetes to automatically deliver a measured dose of insulin into their bloodstream. Traditionally they have involved a canula and separate connected pump, but more recent models have taken the form of a patch with a pump mounted directly upon it. When [Pete Schwamb]’s daughter received one of these pumps, an Omnipod, he responded to a bounty offer for reverse engineering its RF protocol. As one of the people who helped create Loop, an app framework for controlling insulin delivery systems, he was in a particularly good position to do the work.
hackaday  diy  medical  insulin  diabetes  pump  sumi 
april 2019 by cyberchucktx
A Chrome Extension for Configuring RGB LEDs | Hackaday
With your controller of choice running the BitsyLED firmware, you need something to configure it. For that, [Andy] has developed a Chrome extension which offers a very slick user interface for setting up colors and patterns. The tool even allows you to create a visual representation of your LEDs so you can get an idea of what it’s going to look like when all the hardware is powered up.
neopixel  tool  browserbased  arduino  hackaday  chrome 
april 2019 by cyberchucktx
CyberPunk Yourself – Body Modification, Augmentation, and Grinders | Hackaday
Grinders – men and women who hack their own bodies – are pushing the boundaries of what is currently possible when it comes to human augmentation. They’re hackers at heart, pursuing on an amateur level what they can’t get from the consumer market. Human augmentation is a concept that is featured heavily in science fiction and futurism, but the assumption most people have is that those kinds of advancements will come from medical or technology companies.

Instead, we’re seeing augmentation begin in the basements of hackers and in the back rooms of piercing studios. The domain of grinders is the space where body modification and hacking meet. It mixes the same willingness to modify one’s body that is common among the tattooed and pierced, and adds an interest in hacking technology that you find in hackerspaces around the world. When those two qualities intersect, you have a potential grinder.
hackaday  grinder  biohacking  transhuman  article 
april 2019 by cyberchucktx
JigFab Makes Woodworking Easier | Hackaday
Woodworking is an age-old craft that requires creativity and skill to get the best results. Experienced hands get the best results, while the new builder may struggle to confidently produce even basic pieces. JigFab is here to level the playing field somewhat.

Much of the skill in woodworking comes with mastering the various joints and techniques required to hold a piece together. Cutting these joints often requires specialized tools and equipment – ideally, some sort of jig. These jigs can be difficult to build in themselves, and that’s where JigFab shines.
wood  hackaday  jig  woodworking 
april 2019 by cyberchucktx
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