Memory Tester for DRAM Chips with Arduino Mega 2560 (EN)

After my memory tester for SRAMs worked as intended, I went on with my second Arduino shield for testing DRAMs. With this shield the following DRAMs can be tested:

4k x 1: 2104A, 4015, 4027, 7027
16k x 1: 4116, 2117, 6116, 8116, 416, 2116, 3716, U256
16k x 1: 2118
16k x 4: 4416, 2620
32k x 1: 3732H (4532-L4) und 3732L (4532-L3)
64k x 1: 4164, 2600, K565RU5, 8264, 3764
64k x 4: 4464, 41464, 50464
256k x 1: 41256, 53256, 81256, MT1259 883C
256k x 4: 44256, 514256
1024k x 1: 41024, 411000

Theoretically, all other DRAMs that have an identical pin assignments should also be able to be tested. The following video shows how the tester works with a faulty 4116.

Failed memory test of a 4116

To test 4116 chips, the shield has a pin header for the voltages + 5V, + 12V and -5V. In the video, a converted ATX power supply is used, which supplies these voltages stable.

Memory Tester for SRAM Chips with Arduino Mega 2560 (EN)

The revised version of my memory tester has been finished. The following SRAMs can be tested:

1k x 1: 2102
1k x 4: 2114, 2148, 2149, 5114, 6514, C214, U224
1k x 4: 6550
1k x 8: 4118, 4801
2k x 8: 2016, 4016, 4802, 4812, 6116, 6512
8k x 8: 2064, 2464, 6264, 2465
32k x 8: 20256, 61256, 62256, 71256

Theoretically, all other SRAMs that have an identical pin assignments should also be able to be tested. The following video shows how the tester works with a healthy 2102.

Successful memory test of a 2102

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