DX5C and reverse lights question

[oldnick]

I've wired up some reverse lights on my crawler, and want them to come on automatically whenever I go backwards.

Can anyone tell me how or point me to a guide online somewhere how to achieve that with an aux channel mix on my Spektrum DX5C?

Thanks in advance

 

[WickedFog]

You need an LED light controller. You can find all kinds of them on Amazon.
https://a.co/d/07oKRqqN

Welvcome to RCT!

 

[oldnick]

Cheers WF, I have a mosfet switch plugged into aux2 on the rx, it’s just I’ve forgotten how to program the tx it to switch the channel “on” when I hit reverse.

 

[WickedFog]

Oh. I have no idea there, sorry.

 

[Chubaka]

What light kit do you have? The old school way I did it was silder the leds to the motor wires. This plug and play is getting fancy.

 

[oldnick]

The lights are what came with the gmade buffalo kit plus the optional extra bumper and roof rack ones, the reverses are 2 warm whites run in series with a big resistor to dim them right down plus 4 Injora spotlights as flood/reverse lights up on the roof.

The switch is this thing. Nice and small but handles 3s voltage just fine, so the lights are bright enough to drive by.

 

[bill_delong]

If your radio offers mixing capability then it should work, here's how I did with a Radiolink system:

 

[oldnick]

Thanks for all the suggestions, I've arrived at an acceptable solution, if I find a better one I'll update the thread. I chose to use Aux 2 channel, switched on and off by switch C, substitute your own values.

1. Go to mixing on the menu. Scroll down to mix 0 and click on it. This will open a screen with master/slave/rate etc.
For Master select Throttle, for Slave select Aux 2, for Rate select -100% +0%, for switch select C (two position [0][1]), for Trim select Inhibit.

2. Go to Aux Assign. For Channel select Aux 2, for Input select Inhibit.

This got me reverse lights, but they only came on with quite a fast reverse. To improve things;

3. Go to Sub Trim. For Aux 2 scroll to +100.

For my nano switch linked to above it is triggered at about 45/100 showing on Aux 2 on the monitor screen. By chucking maximum sub trim at it the resting position of Aux 2 is moved to 29/100. This means the throttle only has to get to about -15 to trigger the reverse lights. Not perfect as the mix only links the reverse throttle and Aux 2 as a mirror of each other, whereas I want ANY reverse to trigger 100% Aux 2.

Stay tuned for the next thrilling instalment...

Edit: Greatscott on RCC recommended this thing from Hey,OK and it would indeed do the job (and more) perfectly. But I'm skint...