4116 RAM tester

original article

   I needed a 4116 RAM tester for a vintage computer (ZX Sinclair Issue 2) and I search on internet.

   I find some article:
- http://www.ukvac.com/forum/cheap-arduino-ram-tester-cart-join-in_topic356093.html

- http://www.ukvac.com/forum/cheap-arduino-ram-tester-cart-join-in_topic356093.html

- https://www.youtube.com/watch?v=LPavFz61ifM

- https://github.com/Judder/arduino-93422tester
   My colegue, Dragos, made 4116 RAM tester using a schematic like that,

just he used Arduino Nano instead Arduino Uno:

   You can see their test in 4116 RAM tester with Arduino