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docsleepy
Guest
My power supply for the Chargemaster says it is 9volts. They may do fine with 12 volts, but then again....
A diode drops about 0.6 volts; if you rigged up about 4 or 5 diodes in series, you would have a nice 9 volts from a 12 volt battery. My power supplly said it was 1 Amp, so 1 AMp diodes from radio shack would probably work. If not, 3 Amp ones would work fine.
They sell 400V 1Amp diodes for fairly cheap. Because there is a motor inside, there is always the chance that the diodes would blow, but then you could just short them out. One reverse diode would prevent any risk at all.
I'm at work and don't have any way to put up a schematic.
There are also fancy 3 terminal regulators, but for such a simple drop, diodes are much easier.
(I was a EE in my former life)
A diode drops about 0.6 volts; if you rigged up about 4 or 5 diodes in series, you would have a nice 9 volts from a 12 volt battery. My power supplly said it was 1 Amp, so 1 AMp diodes from radio shack would probably work. If not, 3 Amp ones would work fine.
They sell 400V 1Amp diodes for fairly cheap. Because there is a motor inside, there is always the chance that the diodes would blow, but then you could just short them out. One reverse diode would prevent any risk at all.
I'm at work and don't have any way to put up a schematic.
There are also fancy 3 terminal regulators, but for such a simple drop, diodes are much easier.
(I was a EE in my former life)