Hi everyone,
I have researched google, digikey and E-bay and I have some ideas but I wanted to come here before I made my final decision. I have a low power application where the input voltage can be anywhere from 50VDC to 90VDC (extreme cases) but the nominal would be about 74VDC. There is an off the shelf power supply that will supply 1.25A and the output is 12VDC but it's $50 and too big for my application. I thought about using two power resistors as a voltage divider and the supplying a 7805 to run the PIC. I have seen other DC-DC converters on the internet and they are really expensive. I would only need to run about .5A max for everything on my circuit. If I need to, I can drop the current to .1A. Are there any other ideas that I can use to accomplish this?
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