[tckma]

Originally Posted by Biff

We tested one of our sensors, and all we needed was the first pwm cable and a single wire from 12 to a 20 amp "custom circuit" breaker. The pwm was plugged into a digital input.

Do you need to hook these up to a Spike?

Our team is using two hall effect sensors, on the two gears for our main drive.

I looked at this thread yesterday, and hooked up the sensors as described, with power plugged into the main board on a 20 amp breaker (two sensors on one breaker). The sensor outputs were hooked into the digital inputs, and we were getting readings from the sensors just fine (save for a code problem we are working on). I left the redundant ground from the power PWM cable disconnected.

There was some discussion at this morning's meeting about whether or not to power the Hall Effect Sensors through a Spike (this would involve some coding to make sure the Spike is either always on, or only on when taking a reading). I couldn't see why you'd need one, but the discussion was left unresolved as of when I went home.

Also, does each sensor need to be on a seperate 20 amp circuit? I put them both on one just because we were trying to get it running quickly so that we could test code. I doubt those little sensors will ever draw 20 amps, personally.