This is my attempt to document the learning process and construction of a Transistor Tester based on an Atmel AVR chip and designed by Markus Frejek. There are many variations of this project online but I wanted to show how I had to overcome several issues, one being my lack of any way to make a PCB (Printed Circuit Board), and come up with a final working result.

I will try and keep each blog post about one or a part of one component in the development. These include:

• An LED UV (Ultra-Violet) Exposure Box
• Exposure Timer
• An AVR Programmer
• Working with Eagle CAD PCB

Development continues and at the moment, I’m trying to develop an SMD (Surface Mount Device) version of the PCB.