We spotted this project via a review for an Adafruit 1.14" 240 x 135 colour TFT display which they used in their build. Many thanks to Albert for bringing this to our attention.
Albert is using the display on a Pico DRAM Tester board, a board designed by Tube Time to test old-school DIP dynamic RAM chips from vintage computers like the Commodore 64, ZX Spectrum, etc. The tester is powered by an overclocked Raspberry Pi Pico 2 and it can test RAM at full speed, quickly telling you if your RAM is good.
Learn more about the Pico DRAM Tester
Pico DRAM Tester is "a simple 2-layer board, 100mm x 100mm, and 1.6mm thick" that can be fabricated at your choice of PCB house. Your DRAM chips can be tested in your choice of socket, but the smart choice are ZIF (Zero Insertion Force) sockets that use a small lever to lock them into place.
The Adafruit 1.14" 240 x 135 colour TFT display is used to display the test results and to aid controlling the many tests that it can undertake. Pico DRAM Tester performs March, Psuedorandom and Refresh test, putting your DRAM chips "through the wringer" before giving you the final report.
Retro YouTuber Lee from More Fun Retro has a great video that details the assembly and testing of the Pico DRAM Tester, comparing it to other retro chip testers.
Working on a cool retro project that uses our kit? We'd love to know more!