Hello all!
I have a Denso 12V motor (p/n 063700-1544) that I'm trying to use for a temperature control driver. At the moment, I can use an available Toshiba TA8050P motor driver chip and a 3 position switch to drive the motor fwd/off/rev. Full sweep, the motor drives thru 90 degrees.
However, I'd like a more elegant solution using a rotary switch that has 15 discrete positions. I'd like this circuit to be as simple as possible; it will be driven by a 12V power supply.
Attached is a scan of the motor drive circuit board: (the attached wiring is listed 1 thru 5 at the image bottom. 1 and 2 are the motor leads. 3, 4, and 5 provide resistive feedback. At full sweep one way, there is 4.8kOhms between 3 and 4 and 1.45kOhms between 3 and 5. A 90 degree full sweep the other way, there is 1.3kOhms 3 to 4, and 4.9kOhms 3 to 5. The resistance varies linearly between these extremes).
I'll list the switch logic in the next post...
I have a Denso 12V motor (p/n 063700-1544) that I'm trying to use for a temperature control driver. At the moment, I can use an available Toshiba TA8050P motor driver chip and a 3 position switch to drive the motor fwd/off/rev. Full sweep, the motor drives thru 90 degrees.
However, I'd like a more elegant solution using a rotary switch that has 15 discrete positions. I'd like this circuit to be as simple as possible; it will be driven by a 12V power supply.
Attached is a scan of the motor drive circuit board: (the attached wiring is listed 1 thru 5 at the image bottom. 1 and 2 are the motor leads. 3, 4, and 5 provide resistive feedback. At full sweep one way, there is 4.8kOhms between 3 and 4 and 1.45kOhms between 3 and 5. A 90 degree full sweep the other way, there is 1.3kOhms 3 to 4, and 4.9kOhms 3 to 5. The resistance varies linearly between these extremes).
I'll list the switch logic in the next post...
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