LED easy way for on/off from TX?
 

Hello I order the axial led control unit but I also want to be able to turn on/off the 5leds that would go in the proline lightbar from the TX. what I need to be able to do that
thanks.

thanks I would order one now "thumbsup"
the only thing I dont like is that I need another battery:cry:

why not use a punkrc dig unit or a novak dig controler... either one should get the job done (novak might be better for this application) then you could wire it so you wouldnt need another battery.

A micro servo on an extra channel that presses on a switch might do the trick. Sorta like the dig switches that are used on MOA trucks.

Hobby city has switches that plug into the reciever, light's plug into the switch. extra channel turns lights on and off.

costs about $7...

http://www.hobbycity.com/hobbycity/s...rolled_Switch_

Alright, so looking at the above suggestions, you have given me a few questions.

I was under the assumption that the RX used a DC voltage to tell things like servos and ESCs how much power they were going to be supplied and that the voltage information came from the RX actually. K, that's a bad explination, let me reword into nerd-speak.

Let's say I want to turn left. I assumed that the RX sent a -5VDC signal to the servo, which caused it to turn left. If I wanted to turn a little left, then the voltage would be something like -3.5VDC. Apparently this is not how this works, and the ESC does all this work then instead?

The reason I was wondering is actually very similiar to the OPs question. I even busted out the multi-meter and hooked it up to various leads on the RX and tried doing all sorts of crazy things while looking for voltages. I have a TQ3 and I wanted to use the 3rd channel to give me remote operated lights.

Basically, can someone clear up the actually electical functions and controls of the RX, ESC and their relation to the servos and motors.

(Sorry about jacking your thread, but I want to know whats going on instead of just dropping the $7)

The Rx sends pulses to the servos and ESCs. The width of the pulse determines the position of the servo.

These pulses are way too fast to see with a multi-meter - they happen hundreds of times a second. IIRC, a "neutral" pulse is 1500 micro-seconds. Full deflection one way is 800us, the other way is 2200us.

The PCB in the servo converts this signal into a DC voltage which drives the servo's motor.
An ESC has a similar circuit.

I get so happy when people speak nerd to me. I may be able to see these pulses on my oscilloscope. No wonder I wasn't able to get a reading of the multimeter.

That's pretty fancy, here I was thinking it was just a simple DC circuit. I guess I didn't account for the microwave radio transmissions going on, or the signal that is being transmitted it self. I just thought it was two crystal oscillators.

Thanks for the info.

Maybe another possibility.....

http://www.rccrawler.com/forum/electronics/114239-light-switch-your-scaler-firmtronics-rc-switch-review.html

Jay