Collaborate Disseminate
So it turns out that walking around with $4,000 worth of hardware on your head isn’t quite the peak technology experience that some people thought it would be. We’re talking …read more Continue reading Hackaday Links: February 18, 2024
Continuing the concept of saving planet Earth with gnarly, repeatable hacks, the fifth and final challenge of the 2022 Hackaday Prize is all about making the world better with smart …read more Continue reading 2022 Hackaday Prize: Save the World Wildcard Challenge Begins Now
Following along with the 2022 Hackaday Prize theme on building a better world by doing what we all do best – hacking together solutions – the fourth round of the …read more Continue reading 2022 Hackaday Prize: Make Your World More Disaster Resistant, More Engaged
The electrical signals emitted by the human body tell us a lot about what’s going on inside. But getting those signals inside your microcontroller is not straightforward: the voltages are …read more Continue reading Universal Bio-Electrical Signal Amplifier Makes Reading Body Signals Easy
It’s difficult to tell with our dull human senses, but everything around us is vibrating. Sure it takes more energy to get big objects like bridges and houses humming compared …read more Continue reading With a Big Enough Laser, the World is Your Sensor
Police could set up transceivers outside a building and compare spectrograms of suspects walking vs. crime scene footage. Continue reading Wi-Fi signals let researchers ID people through walls from their gait
Reading the temperature of your environment is pretty easy right? A quick search suggests the utterly ubiquitous DHT11, which speaks a well documented protocol and has libraries for every conceivable microcontroller and platform. Plug that into your Arduino and boom, temperature (and humidity!) readings. But the simple solution doesn’t hit …read more
For years [Edward] has been building professional grade underwater sensing nodes at prices approachable for an interested individual without a government grant. An important component of these is temperature, and he has been on a quest to get the highest accuracy temperature readings from whatever parts hit that sweet optimum …read more
Continue reading An Epic Tale of Thermistors: Tricks for Much Better Temperature Sensing
Temperature is one of the most frequently measured physical quantities, and features prominently in many of our projects, from weather stations to 3D printers. Most commonly we’ll see thermistors, thermocouples, infrared sensors, or a dedicated IC used to measure temperature. It’s even possible to use only an ordinary diode, leading to some interesting techniques.
Often we only need to know the temperature within a degree Celsius or two, and any of these tools are fine. Until fairly recently, when we needed to know the temperature precisely, reliably, and over a wide range we used mercury thermometers. The devices themselves were …read more
Continue reading Move Aside Mercury: Measuring Temperature Accurately with an RTD
Diabetes is a disease that, among other things, has significant effects on the feet due to a combination of neuropathy, vascular issues, and other factors. You may have seen special diabetes socks with features like non-elasticated cuffs for better circulation and a lack of seams to prevent the formation of blisters. Taking care of your feet is essential in diabetes to prevent injury and infection. Ebers is a project that seeks to help in just this area.
Ebers monitors plantar pressure, temperature, and humidity in the sole of the shoe. It then feeds this data back to a smartphone for …read more
Continue reading Hackaday Prize Entry: Ebers – Diabetes Care, Step By Step