IR Remote Switch Circuit

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This circuit lets you control any line powered electrical device (a lamp, television, fan, etc.) using any infra-red remote control. Almost everyone these days has a pile of old IR remotes left over from appliances they have long ago disposed of them. With this circuit, you can put them back into use. The circuit looks for any modulated IR source and uses it to control a TRIAC, which then switches any appliance connected to it's socket. For example, you can use it to control the room lighting in your home theater setup using any of the remotes you already have. The circuit is powered using a simple transformerless power supply from the line itself, making it compact and easily built into a light switch, wall box, power bar or even the appliance you wish to control.


Schematic of the IR Remote Switch

Printed Circuit Board Layout

PCB of the IR Remote Switch

Printed Circuit Board Parts Placement

PCB parts placement of the IR Remote Switch


Total Qty.
R113 Meg 1/4W Resistor
R211.2 Meg 1/4W Resistor
R31680 Ohm 1/4W Resistor
R412K 1/4W Resistor
R514.7K 1/4W Resistor
R61150 Ohm 1/4W Resistor
C110.001uF Ceramic Disc Capacitor
C2, C521uF 50V Tantalum Electrolytic Capacitor
C3147uF 50V Tantalum Electrolytic Capacitor
C4110uF 50V Tantalum Electrolytic Capacitor
C51150 Ohm 1/4W Resistor
D111N4733 5V Zener Diode
D211N4003 Rectifier Diode
Q112N6071A TRIAC
U11GP1U52X IR Module
U21MC74HC74 D-Type Flip Flop
U31MOC3011 Opto Isolator
MISC1Board, Sockets For ICs, Mains Socket, Mains Plug and Cord, Wire


  1. Under normal circumstances, Q1 should not need a heatsink.
  2. The circuit is designed for a supply voltage of 120V.
  3. The printed circuit pattern is reproduced here larger then real life for clarity. It will need to be resized to the scale at the bottom of the image if you intend to transfer it to a board.
  4. The circuit functions as an on/off flip flop. Illuminate it with your remote once to turn it on, then again to turn it off.

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Add A Comment

IR Remote Switch
Tuesday, August 07, 2012 1:06:04 PM
How can i control more than one electrical appliances using this circuit? For Eg: to switch ON and OFF the two lights. How can i do this? please help.
220v changes
Sunday, June 10, 2012 10:47:07 PM
I think that if you use R5=8k2, R4=4k7 and R6=330 ohms, the circuit will works fine in 220Vac Hope to help...
IR Remote Switch
Monday, September 19, 2011 9:12:41 AM
can you make any changes for any components necessary to change when use this circuit with 220 volts AC?thanks
IR Remote Switch
Wednesday, March 16, 2011 10:59:46 AM
I was wondering which way the polarity of the Zener is going and if you had any more notes or information on this project. Im currently working on this for a school assignment. Thanks
IR Remote Switch
Thursday, August 05, 2010 5:06:45 AM
u can add a relay (6volt) andd take a 220 volt supply out
Re: c5 capasitor
Thursday, January 28, 2010 1:24:53 AM
c5 = 1uF 50V Tantalum Electrolytic Capacitor
Wednesday, January 13, 2010 8:20:40 AM
What modification can we made if we are going to use it on a 220V? THANK YOU..
IR Remote Switch
Monday, October 26, 2009 10:24:57 AM
What modification can we made if we are going to use it on a 220V? Thank you and more power!
c5 capacitor
Saturday, October 03, 2009 11:04:53 AM
Sorry but i think, C5 should be capacitor but it seems resistor, 150 ohm.
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