R/C Switch #3, for Radio Control Applications

Parts List:
R1,R2,R3 = 10K P1 = 20K, multi-turn trimmer pot C1,C3 = 10uF, 16V C2 = 0.1uF (100nF) IC1 = CD4001 CMOS Q1 = see text
Description:
This is a simple electronic switch to replace a servo and micro switch to do the on-off switching.
Connect the input to a spare receiver channel, like 'Gear', or any other. Adjust P1 for the setting you want on any proportional channel. The 'Out' pin of the collector of Q1 goes to relay if you switch a battery load on/off.
For Q1, use any suitable type to switch your relay. I used a regular 2N2222A + 5A relay for the job (on/off switching a 12V/2A battery pack).