Core not working

MIDIbox SID
1

I have completed a core and sid build. The core worked fine yesterday after I applied a 9v500ma power to it (I failed in my attempt to convert my c64 power supply). I was even able to load mios and the lcd worked good too. Today after I got some new parts I tried to use the optimized power supply plans from TK and my core stopped responding. The 7805 got extemely hot, but it did the same yesterday before I used a 9v pwsply. I put the 9v pwsply back on and nothing. I replace the 7805 and still nothing.

Please help

2

Please measure the voltage before and after the regulator and give us the values.

Unplug the PIC before and also measure the voltage for the PIC (Pin 11 & Pin 12).

Please also have a close look on your board for ans bridges, shorts or bad solders.

greets

Doc

3

I think I revived my core. Grounding out pin #1 on my pic brought it back to life. I checked the voltage on my c64 psu and the 9v side is dead. Time to search for a new psu. 12v 1a for a core and sid (6581) right?

Thanks

-D