Well I was talking about this to a co-worker yesterday and he mentioned he had a couple small 12v motors. One he said came out of a small cheap air compressor that plugged into the cig lighter, and the other he has no clue, but he thinks possiably a rc car.
So I fool around with them. The one from the compressor has a gear on the end I cant really use. The unknown one has some brass end on it that looked like it went inside a plastic gear at one time but broke. So its just kinda a round kunrled nub. I find a peice of vaccum hose would tightly slip over it, and then loosely slip over the speed sensor drive (but still enough to grip it) I find a old dimmer switch for the dash lights in a vehicle, I hook it up with the motor and 12v is spinning it way way too fast, even at the low setting. So I try 5v and it sounds more like it. I zip tie the motor and sensor to a peice of wood, wire it all up and give it a try with the broken cluster. Everything seems to be in order. So far its working. I dont have quite as fine of adjustment as I wanted using the dimmer switch, but I can get it up to around 75-80 mph, move it a fraction more and it goes past 80. Not sure I want to run it that fast. I used my multimeter and its putting about 0.8 volts to the motor to get it at the correct rpm. Anyone have any idea of maybe something else with a more fine adjustment I could use to adjust the voltage?
I'm gonna let it run for a few hours with the broken cluster and make sure everything keeps working ok then start on the good cluster.
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