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IR Remote Switch Circuit

2015-09-13 16:42  
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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 



Under normal circumstances, Q1 should not need a heatsink.The circuit is designed for a supply voltage of 120V.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.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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