Cheap 8 channel R/C ancillary controller for models

[electrodoc2]

would have inserted the circuit here but dunno how to do it yet so i'm affraid its a small 75k attachment.

an idea i'm toying with.

 

[electrodoc2]

recently tried this and it works exeptionally well... i didn't bother with the diodes so i used a 4 way opto isolator due to using two seperate supplies. 12volt for the decoder and a 4.5 volt battery supply for the reciever.