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I thought of this after reading and installing DIY on VETCH light. I have a Zex system, which use TPS not a switch to activate the N2O. As do some other full throttle based systems. So althought you know, does the girl in the passenger sit know, or what about your stuiped friends
So any genusis out there can figure out how i can get an Led to light only at full throtte a not at any other time?

 
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You can setup and LED with resistors etc., so when the TPS puts across a certain voltage (which you can find) you can make a circuit that will put across enough voltage to the LED that is enough to make it light up. It works the same exact way that an A/F gauge works, only with one light using one voltage.

 
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Give me a little while... I'll draw a schematic of exactly what you want. But if you are wondering: The TPS reads 4.8V@WOT

 
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I'll be waiting. Thanks.

 
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One of my friend hooked up a small light by his guages that comes on when turned on the "armed" switch. He was trying to figure out a way to make another light comes on when the nitrous activates after going full throttle. Too bad he never finish the job. I'll asked him about how he did lighting for the armed switch.

 
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I forgot about this lol... I can do it, if I know what kind of LED to use. Go to RadioShack or something and tell them: I need an LED that will only activate around 4.7V and higher (WOT). Hook up the ground. Hook up the power end into the TPS sensor wire on the ECU. They will give you an LED choice and an in-line resistor to use.