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Test for "motor on"? — Parallax Forums

Test for "motor on"?

patmat2350patmat2350 Posts: 6
edited 2004-10-12 16:08 in BASIC Stamp

I have a Stamp project, but I'm looking for some passive circuitry to unload overhead on my Stamp.

I have several reversible motors controlled by radio and speed controls. I need a binary test on each motor to see if it's running. I could measure the receiver's signal to the ESC's and look for any pulse width off-neutral, but that's taking too much time with a 20 ms frame rate on each channel.

Each motor lead could be off, pulsing under PWM control, or full on. I'm thinking a simple r-c circuit on each motor lead that will bleed down to zero when the motor is off, and will clamp a high when motor is on or even pulsing slowly. Then feed to OR gates to see if either of the motor's leads are "on".

Any other ideas?

Thanks!

Pat M

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