TI99/4A DC Power Board - Release and Test Build
42The TI99/4A is a wonderful little computer but it's AC PSU is flakey at best. Fortunately the AC to DC board is easily replaced, here we'll replace it with a direct DC board to make powering the machine easier.
The board has been created by the RE:Enthused #keepITalive project and, like everything that comes from it, is open-source and freely usable.
NOTE: This board does seem to have an issue running with certain peripherals installed, I suspect the V7812 should be dropped in favour of a circuit to take 12V straight in and a protection circuit just in case.
https://re-enthused.com/keepitalive/
Hardware, Schematics, Gerbers: https://easyeda.com/jonn.blanchard/ti99-4a-replacement-power-board_copy_copy_copy_copy
V7805-2000 https://www.digikey.co.uk/product-detail/en/cui-inc/V7805-2000/102-2175-ND/2352134 V7812-1000 https://www.digikey.co.uk/product-detail/en/cui-inc/V7812-1000/102-1718-ND/1828611
Background music: Walk through the park by TrackTribe
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