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Todd,
The 8080 board uses the +/- 16V for only two circuits... 1. The 8080 and 8224 clock chip itself (draws only a few milliamps, I'll guess 50ma max) 2. The RS232 transmitter chips 1488's, and I'll guess these use about 10ma max. Check the 78Lxx and 79Lxx regulators for any shorts, or check capacitors for correct polarity? Regards, Josh Date: Sun, 26 Jul 2015 09:15:02 -0700 From: litte...@gmail.com To: n8vem...@googlegroups.com Subject: [N8VEM-S100:7447] Playing with FP Mini, Crustys 8080, Con I/O & SMB I finally found some time to play with my setup now that
I finished the FP Mini board. Why trying to integrate all the boards to work together, I lost my +16vdc.... Out of all the boards, only Crustys 8080 uses +/- 16vdc The switcher I have outputs +15vdc @ 1.5 amps & -15vdc @ 1.5 amps. Was this not enough ? What is the required draw for the 8080 pcb ? Now I can't play today until I get another supply :-( I'd like some setup tips from other users with same setup. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. |