Diy Smart Light Switch . Ic2 is the brain of the circuit, which turns on/off the light connected through the relay based on input state. Now your led should turn on when you push the button, and off when you push the button again. DIY ITEAD Sonoff 10A WIFI Wireless Smart Switch Remote Control for from www.aliexpress.com Placing the servo and the. Goodhome black nickel 20a 2 way 2 gang flat double light screwless switch. This would allow be to snake the switch wires from the stop of the lamp.