Design #3 - PicoMite VGA mini


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Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 5982
Posted: 03:55pm 04 Apr 2023      

I know it works on mine because I've just been using it. :)
As Peter says, you need the full level shifter circuit. That's Q1, Q2, R6, R7,R8 and R9.

Are you able to get the Num Loxk and Caps Lock LEDs to work on the keyboard? If they are working then it has a supply and its on-board controller is running.

Also, check for solder whiskers around the PS2 socket and pins 11 and 12 (GP8 and GP9) of the PicoMite.