[GreenKeys] Loop supply

[John Nagle]

> rmowery28146 at earthlink.net  writes:

> Just to  show how inexpensive you can put together a loop supply and
> interface it to  Eric's USB board for those that do not have much to work
> with.


Nice. Those are cute little switching power supplies.

I'd suggest fusing both input and output; those things have no
protection circuitry and too much power capacity.

			John Nagle