program_insect Posted January 14, 2006 Report Share Posted January 14, 2006 Sorry if this is a dumb question but I'm a novice...I've built the optimized C64 PSU on my prototype board and I notice that the voltage at the 5VDC output measures at 5.13VDC, and the voltage at the 14VDC output measures at 16.54 VDC. I measured the AC coming out of the C64 power supply at 10.67 VAC. Is it normal/OK for the voltages to be running a bit high, or is there a problem with my optimizer circuit or C64 power supply?Thanks. Quote Link to comment Share on other sites More sharing options...
moebius Posted January 14, 2006 Report Share Posted January 14, 2006 Hi,5.13VDC should be Okay - it's still in the limits (and who knows, how much your meter lies ;)). The PSU seems ok too.. But that 16.54 VDC is not good. I think I've got similar results when the regulator had input/output pins swapped..Moebius Quote Link to comment Share on other sites More sharing options...
program_insect Posted January 14, 2006 Author Report Share Posted January 14, 2006 Good call...I did in fact have the regulator in backwards...oops.After that, there was a short in the circuit which seemed to damage the C64 power supply....my 14VDC pin was reading 5.13, so I measured the AC coming out of the power brick and it was only 2.xxx AC!! I had originally measured it at 10.67 VAC... in your opinion, could a short on the optimizer circuit have caused damage to the internals of the power brick?Maybe the lesson to learn is that drinking beer and building electronics is not a good combo... Quote Link to comment Share on other sites More sharing options...
TK. Posted January 14, 2006 Report Share Posted January 14, 2006 could a short on the optimizer circuit have caused damage to the internals of the power brick?it could have blown the fuse of the PSU, but it can be easily exchangedBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
program_insect Posted January 14, 2006 Author Report Share Posted January 14, 2006 I can't seem to open the power brick...is there a trick to it? Also, what fuse will I need? Thanks! Quote Link to comment Share on other sites More sharing options...
program_insect Posted January 14, 2006 Author Report Share Posted January 14, 2006 Or did you mean I should just exchange for a new power supply? Quote Link to comment Share on other sites More sharing options...
moebius Posted January 14, 2006 Report Share Posted January 14, 2006 Seems like you have "a new type" supply. Those are pretty damn difficult to open and then the inside is potted with epoxy.. better get a new PSU..M Quote Link to comment Share on other sites More sharing options...
program_insect Posted January 15, 2006 Author Report Share Posted January 15, 2006 thank you both..now I just have to wait for the new psu to arrive....*sigh* Quote Link to comment Share on other sites More sharing options...
Bartdesign Posted January 17, 2006 Report Share Posted January 17, 2006 I killed my psu aswell. I builded the c64 optimized board. Once connected the led worked, but after a while it stopped. And now my PSU doens't output any voltages :( It's not the fuse.... Oh well, got another 3 psu's on the way so ill figure it out :)Also can i connect the optimized psu board to the psu without connecting the core and sid? for testing the correct voltages? Quote Link to comment Share on other sites More sharing options...
raphael Posted January 17, 2006 Report Share Posted January 17, 2006 Also can i connect the optimized psu board to the psu without connecting the core and sid? for testing the correct voltages?Yes, Core and SID are not required to test the voltage. Quote Link to comment Share on other sites More sharing options...
program_insect Posted January 17, 2006 Author Report Share Posted January 17, 2006 stop hording all the power supplies!!! >:( ;) Quote Link to comment Share on other sites More sharing options...
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