Quote:
Originally Posted by Astro
My hall pot box arrived.
I found very similar results to Jerald except for the voltages.
I am assuming Jerald used +5.0v supply
I bench tested using a +4.91v supply (this was the voltage i had handy) and the pot box has
a zero throttle of +0.26v
throttle contact at +0.26v
full throttle gives +4.83v
There is a small amount of travel near zero throttle and full throttle where the voltage doesn't change. The voltage reaches maximum just a fraction before being stopped by the physical stop. Same at the bottom end, the voltage reaches minimum just before hitting the physical stop.
So the throttle arm starts at it's minimum up against the physical stop giving +0.26v
after about 2% travel the contact clicks and the output is still +0.26v
then another 2% travel and then the voltage starts increasing from +0.26v through to +4.83
at approx 95% travel the voltage reaches +4.83v
voltage then stays at +4.83v right up to 100% travel where the throttle arm is stopped by the physical stop.
This sounds correct to me.
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On the bench I was getting about 4.8v as the max throttle. But in the truck max throttle is 3.85v. I've been scratching my head.
My best guess is that being bolted to the firewall weakens the magnetic field.