If you purchased or built a standard AT power supply, you should be able to use a simple circuit based on an LM317 regulator to get your 3.3 volts.
I purchased a great baby atx mb with a/v but the board accepts atx power only.I've seen several postings as well as web sites displaying dc to dc power supplies, however it seems the power supplies are AT only. Does anyone have any information on the existence of such a device.
oh for ****s sake, get over DC-DC and just buy an inverter..
Dude, inverters are lame, dc - dc's are cool
Oo-ops. Link is here:
Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options
Power good usually is held at +5V. Use a 470 ohm resistor for good measure. Technically this is supposed to be held low and then high for a certain period of time, but most boards don't care about the timing.
I wouldn't recommend using an LM317 regulator to get the +3.3V. It's not DC-DC in the sense that it is a linear regulator and not a switching type and will generate much more heat as a result. Most boards do use the +3.3V to generate the CPU core voltage and it also appears on the PCI and AGP bus, plus some SDRAM use +3.3V instead of +5V
Good point, I wasnt sure how much current was needed (and Im still not) anyway with a slightly higher component count, you could use the MAX788 I think they will handle approx 5A.