I found this nice project, that can serve as a great tool in my workshop.
The circuit was complicated and could not be made on perf board, well it could be but it’d not be pretty, I tried to make the layout single sided, but there were too many unrouted connections, I do not have the tools to make a double sided pcb, so I got help from professionals, sent my design to seeed studio, they are not fast but cheap, I ordered 10 boards for 14 dollars including shipping,
About the circuit:
It has mega-8 as the brain, lcd to show specs of the transistor like which pin is which, what type of transistor it is eg NPN,PNP, N-MOSFET,P-MOSFET, etc., many components can be tested like different types of transistor, diodes, resistors etc, the good thing about this is that it also shows which leg is which, no need to open the data sheet
I’m made this layout in eagle, its 4.9cm x 4.9cm in size.
Next update, after the pcbs arrive in mail.
PCB arrived and soldered it, programmed it, didn’t work 🙁
So went back to basics, soldered on the perf board and guess what IT WORKS!, I used the arduino code, port made by Alberto, http://www.pighixxx.com/lavori/ardutester/
Here it is testing a MOSFET.
This is a great tool.
Here is the arduino code ArduTester