purple_car

I want to use the 3rd channel on my Traxxas TQ3 transmitter to turn on two LED headlights on my car.

So anyone know how I can take those three prongs on the wire that comes out of the 3rd channel on the receiver and use them to turn a switch on and off? Can I just use the red wire as the positive and the black as negative and wire the LEDs to those (with a resistor of course)? And will that allow the juice to start flowing to the LEDs when I hit the third channel switch?

Thanks for any information!

purple_car

When I touch the red and black leads from the LEDs to the pins on the receivers third channel, the LED lights up nicely, but unfortunately doesn't turn off when I flick the 3rd channel switch on the controller. So I could use the 3rd channel on the receiver to power the LEDs but so far not to turn them on and off.

Any ideas on how to use the 3rd channel switch to turn em on and off?

claccytim

you could try using a microservo to throw a micro switch

ASSOCIATED_DRIVER

The black and red from the receiver to the servo is the servos power supply, usually 5v to 6v which is always on, Its the white wire that sends the signal for the servo position.

I use 4 micro switches positioned at each end of the servo arm a pair for left and right(turn signals), one for reverse and one for front flashers (looks like running lights.) No need for a third servo.

Just to give you an idea.

purple_car

Cool, thanks for the ideas with the micro servo.

Anyone know anything about that white wire, like what the voltage through it is when the switch is off and what voltage it has when the switch is on? And is there some way to harness that to activate a switch of some kind?

joshuoke

some light kits plug right into any free receiver port, so also the 3rd channel.
then the lights should be controllable with the 3rd channel switch...