OUSilver05

Has anyone attempted to build something like this

http://www.bcae1.com/circuits.htm

It looks pretty simple, by my soldering skills are terrible. I have trouble looking at this diagram and figureing out where the power and ground go to, both look like they are on the fuse, which doesn't make sense to me. Does anyone have a finished picture of one, or a similar design? Would anyone be willing to make one for me for a small fee + parts? Thanks

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pbarrette

Hi OUSilver,

The circuit is fairly simple. D1 is used only for reverse polarity protection. Remove it, as well as the black connection from D1->Fuse and D1->R1. So you are left with +12V->Fuse->R1. The rest of the black is ground. Just don't hook up the power supply backwards.

Actually, given the very low current draw of all components used, even the fuse is probably overkill. It's obvious that he's designed the circuit to be very robust under adverse conditions (read: idiot-proof), but the diode and fuse are basically overkill.

In fact, even R1 is overkill, assuming you have a clean 12v source. Besides, 1ohm 1/4Watt resistors aren't exactly common. Anyway, that's what C2 is there for: Noise filtering.

pb

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