120V LED Night Light

August 23, 2010 by Chris
While it might seem to be a terribly obvious design, a night light that runs off of AC 120v is still worth taking a look at. The circuit, construction, pcb board & layout are all in the project write-up. Make one for your child today!


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Direct to PCB InkJet Printing

August 22, 2010 by Chris
Today's project is another method for PCB fabrication: printing directly onto the pcb. The project write-up details how he did it and gives links to how others have as well. Some pretty good quality came out of this method, so it's likely catch your interest as it has mine.


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DIY ECG Machine On The Cheap

August 21, 2010 by Chris
Here's a medical oriented project: DIY ECG Machine. The project write-up goes through the machine that he's built and gives you some guidance towards building your own. For anyone who is new to the medical field, this is some really cool stuff.


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Using an AVR as an RFID tag

August 20, 2010 by Chris
In a little more sinister project, this guy used an AVR micro controller to act as an RFID tag. Hopefully the security gurus see stuff like this in action and realize how bad access control security really can be. The write-up has a few pics and gives a good general overview.


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Network Controlled Air Conditioner

August 19, 2010 by Chris
This project uses a small embedded board to gain computer control over an old school air conditioner. The write-up goes through the process of hacking the A/C board and making php scripts to control it. There's even a short youtube video to sum it all up!


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Homemade PCB (Etching)

July 8, 2010 by Chris
This tutorial guides you through the toner transfer process of making a 1-layer PCB board. The board made in this example is a simple 1.2v - 2.5v - 3.3v - 5v power supply board. There are many pictures and videos to help guide you through the process.


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Simple Motor Optical Encoder

November 11, 2009 by Chris
In our latest PyroElectro tutorial, we show you how to make a basic optical encoder for any mechanical system. Our example setup uses a simple printer pully and motor system. The write-up includes all source code, schematics and parts lists you'd need to build it.


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True Random Number Generator

October 2, 2009 by Chris
A True Random Number Generator seems to be a mathematical myth. However, we can still get pretty good random number generators. This AVR uses noise sampled from a transistor in the breakdown region which should be seemingly random. The schematic layout & source code is available in the project write-up!


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Z80 Text Scroller

October 1, 2009 by Chris
While surfing around I ran across the Z80 Text Scroller by Tim Williams. Tim's website has a lot of his personal projects and they all have the DIY feel that I love. Take a look at the text scroller and his site, hardware schematics & software are there as well!


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PICAxe Serial Keyboard

September 30, 2009 by Chris
The PICAxe serial keyboard was built to interface with a XENIX computer. It is fairly custom when compared to the way keyboards work now-a-days. However, I felt the project was noteworthy enough to take a look at. Hardware schematics & software are available for download.


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