WTS: 4116 DRAM tester (as kit or fully assembled)

بواسطة Alexey

Guardian (3204)

صورة Alexey

22-08-2021, 18:55

I made one tester for myself and I am selling the rest as kits or as fully assembled and tested devices. This is the open-source 4116 DRAM tester (not designed by me), it can only test the 4116 DRAM and nothing else. Some of this DRAM was used in MSX1 computers, for example in Yamaha CX5M. So, this device that generates necessary voltages (+5v, -5v, +12v) can be used to test and repair those computers. The device can be powered by either external 9V PSU or by 5V via the USB cable connected to Arduino.

The price for the kit with all parts and programmed Arduino is 35 Euro.
The price for the kit with all parts, but without Arduino is 25 Euro.
The fully assembled and tested device is 45 Euro.
The shipment to any EU country is 4 Euro without tracking and 8 Euro (with tracking). I will not ship outside of EU, sorry.

Current number of available kits/devices: 3

I can also trade the kit or the assembled device for some interesting MSX hardware.

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بواسطة sdsnatcher73

Prophet (2235)

صورة sdsnatcher73

22-08-2021, 21:55

Pretty cool stuff!

بواسطة Alexey

Guardian (3204)

صورة Alexey

29-08-2021, 16:51

Prices have been adjusted. Also, no-tracking shipment option added.

بواسطة Alexey

Guardian (3204)

صورة Alexey

20-09-2021, 01:50

I've made 2 cool mods for this tester:

https://youtu.be/l2obU3OutcI

https://youtu.be/3SO_ANR2R4o

بواسطة Alexey

Guardian (3204)

صورة Alexey

17-09-2021, 01:25

And finally, I created the OLED screen mod for this tester. Now I need to finish modelling the case and then all the files will be released to the public.

https://www.youtube.com/watch?v=xCpwUrdpjSY

بواسطة Alexey

Guardian (3204)

صورة Alexey

20-09-2021, 01:50

The project is now complete. You can watch the video with the final testing here:

https://www.youtube.com/watch?v=ttnk__r6ZxU

All files for this project are available in my Github repository:

https://github.com/Wierzbowsky/4116TesterMod

Reminder: I still have 3 DIY kits of the original tester for sale. I can also assemble the original board, but I am not going to mod it or sell it with the 3D printed case, sorry.

بواسطة Alexey

Guardian (3204)

صورة Alexey

19-10-2021, 22:45

Only 2 kits left. The repo has been updated (corrected readme and BOM in text format added).

بواسطة sdsnatcher73

Prophet (2235)

صورة sdsnatcher73

20-10-2021, 07:41

Nice project Alexey. When I look at the videos I sometimes see a short flash in the red LED but in the end the chip is tested okay. What do these short red flashes mean?

بواسطة Alexey

Guardian (3204)

صورة Alexey

20-10-2021, 11:01

There are 4 different tests. After each test there's a short red flash. It's some sort of progress indicator when you don't have a screen.

بواسطة sdsnatcher73

Prophet (2235)

صورة sdsnatcher73

20-10-2021, 16:04

Ah that’s a nice feature indeed.