Question on use of 3rd channel of rx/tx

[ChiefGeek]

So I'm looking at upgrading my rtr radio system to something a little better and need some advice.

Question is about the 3rd channel. For example the DX3C is a 3 channel. How can this channel be used? I see things about mixing, which I'm assuming is for 4 wheel steering, but can this channel be used for on/off function? What I'm wanting is to plug my leds into the 3rd channel and be able to turn off and on remotely. Can this be done easily?

 

[revo_rob_1984]

yes it can be done, i've never personally done it but i have seen it done

 

[ChiefGeek]

Apparently you have to buy a doodad that the lights plug into then the doodad goes into the receiver. Just gotta find the doodad. In theory its simple. 3 wires on reciever +/-/control (I'm assuming), The doodad would simply act as a switch.