Spectrum Computing

Muttley Black wrote: ↑Sun Apr 26, 2020 3:24 am Hello sure, but I am not sure if I understand the question. If you mean how this board get power to work the answer is, through the Arduino.

That is what I meant! Thankyou!

Hello all.

This is the final design for my Arduino 4116 Dynamic Ram tester. At least for this version. I can’t wait for my first prototype boards to came and start the testing. After that and if all go smoothly i start the printing for this version. 7~12 dc volt barrel jack fitted in this version to power up the board from external power supply and not only through the Arduino usb, plus i add some protection for the Arduino

Looking good

Mark

Thank you Mark.

The prototype pcb's has not yet arrived, but i decided to do some changes for the final version. I reduced the board size. From 12cm x 11cm it was, it came to be a little less than 10cm x 10cm. This is because the cost of its construction is significantly reduced, but also for reasons of space saving.

Almost done!

I am waiting some more components to arrive.

herbert_s wrote: ↑Sat Mar 07, 2020 5:56 pm found a really nice memory tester project here:
https://8bit-museum.de/sonstiges/hardwa ... hertester/
There is a manual available and some videos. Looks promising...

The guy has updated the hardware
https://8bit-museum.de/sonstiges/hardwa ... hiptester/
Seems to be a really great tester
https://forum.classic-computing.de/foru ... museum-de/

Waiting the damn inductors to arrive....

There was some errors in the prototype PCB. I did some emergency cable jumpers to solve the problem. Now it is ready and 100% in working order. Sadly I need to order some new pcb’s for the final test. This tester work also with 5 volts, through the Arduino usb plug. This future make it a bit portable with a power bank.


[media]https://vimeo.com/454361906[/media]

Ahh, bodge/mod wires are normal for a first version. So don’t worry about it

It’s working, that’s the cool bit

Mark

Update: viewtopic.php?f=22&t=3737