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. dram tester