Here’s how to turn some old circuit boards in to a handy dandy ring binder, the Instructable says it – but we’ll say it again, PCB dust is nasty stuff take precautions when cutting, drilling, etc – Link. Related: Motherboard PCB bracelet – Link. PCB key fob – Link. Circuit board earrings – Link. Circuit […]
This ultra-compact electrocardiogram device was made using an ARM training/development unit – It is a STM32 Primer with two copper foils placed on each side of the front circle. These two metal foils are the ECG electrodes. User can place his/her both thumbs on the copper foil to start the operation. The ECG trace is […]
This is a single transistor FM transmitter that is about the size of a standard AA battery. The site has all the schematics and technical specifications needed to complete the project. Let the bugging begin! – Link Related: HOW TO – Make a telephone FM transmitter – Link HOW TO – Make a low power […]
Having the doorbell ring just when you fell asleep, after your all-night soldering frenzy, can be a real annoyance. This simple project will allow you to turn off the buzzer or bell for 10 hours, allowing for a nice long nap. – Link
This would make a great addition to your fish tank, and it’s a good starting point for a complete automation system. Alan admits a simple stick-on thermometer would have worked, “but what is the fun in that?” When the tank is cleaned the fish are removed and placed in a small amount of the tank […]
BREAKING NEWS FROM MAKE: The gang from Botanicalls (Kate Hartman, Kati London, Rebecca Bray, and Rob Faludi) used one of Adafruit’s new Ethernet shields for Arduino to make some plants talk – and now you can too! That’s right, having your houseplants Twitter you when they need water and more! “Botanicalls Twitter answers the question: […]
Here’s a 2 liter plastic soda bottle leyden jar, can be shocking, even dangerous, don’t do this unless you know what you’re doing (here’s what they’re all about, Wikipedia)… The Leyden jar is an early device for storing electric charge invented in 1745 by Pieter van Musschenbroek (1700-1748). It was the first capacitor. Leyden jars […]
