Description

Arduino Nano Uno DRAM tester for vintage computers, a simple 4164 and 41256 DRAM chips tester using Arduino Nano or Uno, original by ISS from forum.defence-force.org

Parts list:

– Arduino NANO or UNO
– 1 Resistor 220~470 ohm 1/4W (typ. 270 ohm)
– 1 Resistor 1K ohm 1/4W
– 1 DIL16 socket or ZIF
– Header pin connectors to accommodate Nano (female) or Uno (male)
– 1 Jumper or ON-ON switch
– 1 Tactile Switch PTH 6mm (B3F-1020) *optional*
– 1 Common Anode Green-Red LED 3mm/5mm 15mA/20mA (3pin)

. You can find almost all the components to build this computer in my webshop.

This is the project page: https://forum.defence-force.org/viewtopic.php?t=1699

Sourcecode: dramarduino.ino.2020-10-29

I build this myself because I sell Dram chips and when they are older it is nice to know if they still work. I test most old components before selling them in the webshop. I have received components myself in the past that were Dead On Arrival and I try to avoid that. If you work with old Dram chips, this little cheap board may be handy. Just place a dram chip in the socket, press the button and a red light means failure, a green light means OK.