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Old 07-06-2005, 10:38 AM   #17
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Originally Posted by ca1242
The switch is not a hard wired switch, it is just a logic signal, so it doesn't source enough current to turn anything on (not even a relay). I ended up making a current amplifier.

Here's how I did it: You need to check with a meter to verify, but if memory serves me right, it was a yellow wire (or yellow with another color stripe, maybe black?). I cut the wire (to avoid feedback back into the car) and hooked up an amplifier (made from transistors) to power the V1 up. Depending on what you are powering, you might also need a relay. Keep in mind that the switch is an on/off switch, not a pulse.

If you want, I can give you schematics of the circuit I made (actually a timer/amplifier). I haven't tried, but you could just probably get by with a single transistor. Another option is to buy a pre-built amplifier like the one I made from Select Products ot Accele Electronics, probably for $20 - $30.
Thanks for the info What I want to use the button for is an on/off switch for my carputer. It could either go directly to the carputer itself, or to the carputer's power supply. I think I'd be better off buying a pre-built but maybe I could get by with the schematic you made. What do you suggest for my application? Thanks again
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