A single channel radio controlled transceiver can control four peripheral functions

The single function radio controlled (R/C) switch which has just one set function and one relay, has limited usefulness. Described here is the construction of an R/C interface unit which has four switched outputs. The unitresponds to the transmitter’s joystick movement, controlling the four outputs, switching them on or off. As the joystick is pushed from one extreme to the other, so the outputs are switched in sequence.

The unit could form part of a crude speed controller, giving one or two speeds each in forward or reverse. It can also be part of a model’s effects facilities, such as in the case of a model car with working indicator lights. The unit could also be connected in parallel with the steering servo signal and as the model turns in one direction, the unit would switch on the indicator lights on the appropriate side. There are numerous other possible uses specific to a model’s needs.