In Reply to: power supply posted by David Liechti on 02/06/01 at 10:27 AM:
Well, if it weren't for the 300ma requirement, I'd say to go with a VB409 from ST Micro Electrionics.
It can put out 5vdc at up to 70ma (regulated to 5%), and it can also put out 12~15VDC unregulated (up to 400ma, but only for 10ms max)
It will work off of rectified 110 or 240vac (50 or 60hz). All it needs is full or half wave rectifier, 2 resistors, and a cap (like 220 to 330uf electrolitic), maybe a heatsink if your stressing it out, and possibley (if you want) an small inductor to maximize its efficentcey.
Take a look at it at http://us.st.com (enter VB409 in the searc text box there).