I am using my Weatronics 12-22R receiver in the large SM Viperjet, driving it all with a Graupner 12 channel MX24S TX.
I need more than 12 inputs to control all the servos/ ECU / lights etc. Now it is easy for most of them, for example the nose wheel can be
mixed with the rudder and unmixed when the wheels retract, lights can be mixed with retracts so the lights are on when the retracts are down and off
when the wheels are retracted. All this works well on my L39 using all the 12 positions on the tx..

But I need a channel for a smoke pump, which is turned on and off from a switch on the transmitter, is there a way to do this using an extra channel on the receiver??

So advice please...(Yes I know a TX with more channels would the answer but Graupner are running late with the MC32 and it wont be available till later this year.)

Regards to all
Ross