Chief Delphi - regulated power for potentiometer

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Re: regulated power for potentiometer

Quote:

Originally Posted by Ether (Post 1365215)

Apologies if this question has already been discussed in detail in another thread. A quick search returned no helpful results.

What is(are) the recommended way(s) to power a potentiometer so that the signal is less affected by battery voltage change?

Would it be helpful (and legal) to tap into the power going to the radio?

Or perhaps do A/D on both the signal and the power to the pot, and use the ratio?

I believe there is nothing in the electrical part of the rules this year that prevents you from putting a bypass cap across the power and ground leads of your sensor. It will be considered a custom circuit, but thats ok. You can then plug it into the analog bumper as normal.

Hope this helps,
Kevin

Re: regulated power for potentiometer

Guys,
The elephant in the room is that the DSC will drop out at 5.5 volts if sustained for more than a second or two. At that point all output ceases. If using Jags, the Jags will drop out and fault for under volt even if the CAN buss stays up. Please check to see if you are dropping voltage across primary wiring. i.e. all #6 wire, terminals, battery, etc. In over 90% of the cases, this is simly a loose battery terminal or a bad crimp or terminal. If you are using the KOP screw terminals for the battery and the PD I would suggest moving to a crimp or an SLA connector where the screw is not contacting the wire but is trapped by a clamp. Be sure to strip the wire correctly.
While it is not mentioned more, there is a voltage drop across the PD. If you see drops on a critical supply (analog module), you might try moving the breaker position to one closer to the PD input terminals. You are trying to put it upstream of high current 30 and 20 amp loads.