Announcing the ‘Shutter Pod’ project

The goal of the project is to design a timer for SLR cameras capable of taking long exposure and time lapse photography. At the heart of the  device will be a ATmega micro-controller and a 16×2 back lite LCD display. The entire project is being developed as open-source hardware and software being hosted on Google code under the Creative Commons 3.0 BY-SA (share alike, attribution) license for hardware and the GPL version 3 for code. For more information, up to date code and schematics visit


BJT Equation Sheet

This is a handy little cheat sheet that I have been working on with equations for common Bi-Junction Transistor (BJT) configurations. It has schematics, DC equations and AC equations for 8 of the most common setups. It  is not quite finished yet but it’s a start so if you find any mistakes or know of stuff I missed please let me know and I will update it.


The download has been pulled to put the information in a better format and give it an update.