2 Touch Switch ( On and Off switches separated)

Another touch activated switch but this time it has separated touch plate for ON and Off. Advantage of this is you are sure which circuit state you really want, unlike the other touch switch that uses only one plate for on and off. You can replace the bulb with a relay to power up any device like motors.
schematic diagram
Part List :
R1 - 500  kilo ohms 1/4W
R2 - 3.9 Mega ohms 1/4W
R3, R4 - 5 kilo ohms 1/4W
Q1, Q2, Q3 - 2N2222, 9013, or similar NPN transistor
Q4 - 2N4403 or similar (higher the better) PNP transistor
Touch plate - any touch plate for
Lamp - 3V to 6V bulb or relay
DC - 6V battery
2N2222 or NPN pinout
PNP transistor pinout


  1. can i have a description on this one?

  2. description on the functions of the transistors