I'm attempting to make a better alternative for a mechanical WOT switch.


I want to make a relay setup that taps into the main signal wire on the TPS.

Once it reads 4.5 Volts, I want the relay to open to power the accessory.


I'm not too familiar with different types of relays, do they make a relay with a set resistance on the "supply" side? Or would I need to make a small circuit setup with resistance? Possible a transistor?


Some guidance please.. :hail:

 

Maybe an op amp as a voltage comparator. It would need a potentiometer to set the turn-on voltage, probably a transistor to drive the relay, and half a dozen other little bits.

 

First let me apologize for not having a scanner, I swear i'll pick up a new one this week. I do this stuff for a living and I could shoot you a print. A comparator is more precise but all you really need is an NPN transistor wired as a saturated switch with a pot on the base side of the transistor. I drew up a schematic, and I will try to run next door today and post it. 4 parts not counting the relay.

 

Awesome. I greatly appreciate it.

 

TTT...


Just checking if you got that schematic scanned in

 

Didn't forget I'll foreward ASAP

 

Actually, post that kind of stuff here! Never know when that kind of thing could come in handy!

S.

 

Send me an E-mail with a shipping address. Had some time at work and built one. I'll get it out before weeks end. Dan

 

yes, I know, this is old. just wondering if anything came of this. I'm looking to add a hidden WOT switch if I run nitrous at some point.