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I'm just piece-mealing schematics here so I don't know much, period. What would be a good value for the output cap and what would be the downside of 10uf? I already soldered it all together so I would have to go through a somewhat messy desolder to replace it.

Yeah SJ's use 4 AA's but I'm not going to be powering this by battery. The power board brought the 9v wallwart down to 5 so I figure I should. I'm quite new to electronics but doesn't the 7805 protect against some amount of power fluctuation? I think they are rated 7v-35v while I would bet 35v would ...

What's the diode for?

D1 protects the 7805 in case the input voltage is higher than the output, for example if the input is de-powered while the output capacitor C5 is charged. Without the diode, the 78XX could possibly be damaged by reversed voltage. With the 7805 the diode could probably be ...

I'm building a Super Joy III NOAC into a standard project enclosure and I need to know how the power regulator should be built. I have what seems to be the original power supply (4.8v 100mA) though it measures 8.35v. It's going to be attached like this: http://img158.imageshack.us/img158/6348 ...

I'm building a Super Joy III NOAC into a standard project enclosure and I need to know how the power regulator should be built. I have what seems to be the original power supply (4.8v 100mA) though it measures 8.35v. It's going to be attached like this: http://img158.imageshack.us/img158/6348 ...