Simon combined the guts from three wireless power switches into one box – “5 years ago I had three RF controlled light switches each on a different channel. I wanted to combine the three remotes into one and this is the result. I added 3 new colored buttons and powered all three with one battery. It is cheaper than X-10 and the receivers will properly handle non inductive and high amperage loads. I did not modify the reciever ends at all. These RF controlled switches can be bought cheaply at any Home Depot type place – make sure you don’t buy 2 of the same channel which is indicated by a letter code. “ – Link.
DIY 3 Channel wireless light switch controller