Infa-Red Remote Control

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I have received a number of emails requesting schematics for infa-red remotes. So here is one. This remote transmits a tone using an infa-red LED. This tone is decoded by the receiver. Since the receiver only switches when it "hears" the tone, there are no accidental activations.

Schematic For Transmitter

This is the schematic of the IR Transmitter

Schematic For Receiver

This is the schematic for the IR Receiver

Parts

Part	Total Qty.	Description	Substitutions
R1	1	22K 1/4W Resistor
R2	1	1 Meg 1/4W Resistor
R3	1	1K 1/4W Resistor
R4, R5	2	100K 1/4W Resistor
R6	1	50K Pot
C1, C2	2	0.01uF 16V Ceramic Disk Capacitor
C3	1	100pF 16V Ceramic Disk Capacitor
C4	1	0.047uF 16V Ceramic Disk Capacitor
C5	1	0.1uF 16V Ceramic Disk Capacitor
C6	1	3.3uF 16V Electrolytic Capacitor
C7	1	1.5uF 16V Electrolytic Capacitor
Q1	1	2N2222 NPN Silicon Transistor	2N3904
Q2	1	2N2907 PNP Silicon Transistor
Q3	1	NPN Phototransistor
D1	1	1N914 Silicon Diode
IC1	1	LM308 Op Amp IC
IC2	1	LM567 Tone Decoder
LED1	1	Infa-Red LED
RELAY	1	6 Volt Relay
S1	1	SPST Push Button Switch
B1	1	3 Volt Battery	Two 1.5V batteries in series
MISC	1	Board, Sockets For ICs, Knob For R6, Battery Holder
RELAY	1	6 Volt Relay

Notes

To adjust the circuit, hold down S1 while pointing LED1 at the receiver. Adjust R6 until you hear the relay click.

You can increase range by using a high output LED for LED1.

Bright light will stop the receiver from responding to the transmitter.

There is an error in the schematic. There shuold be a 1 megaohm resistor between pin 3 of IC1 and ground. This provides a 0 volt reference to bias the IC.

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Comments

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cynic Infa-Red Remote Control Tuesday, October 06, 2009 11:49:37 AM

to mercurt: please, I want your help about what resistor you substitute the 1megOhm? im also constructing this circuit as our project in data communication...please help me, thanks a lot in advance...

william Infa-Red Remote Control Sunday, October 04, 2009 10:24:45 PM

Is there a way to get more than one channel?

majid thakur Infa-Red Remote Control for chanel latced bottan infa-red remote control Tuesday, September 29, 2009 2:46:32 PM

Could someone please help me? I am a beginner at this kind of stuff and i want to make 4 Chanel infrared remote control, depending on the components. Each device output can be configured to be momentary (turned on while you press the button) or latched. Latched outputs can be toggled on/off by one button per channel, or turned on and off by two buttons per channel. i have one 4 x 8 Chanel schematic for infa-red remote control but that its never responded. You can see that web site (Peter’s electronic projects) DIY remote control based on PIC help me with schematic related part.

Bipin kumar infrared remote control Friday, September 18, 2009 1:10:32 AM

1.whether any programming is required for infrared remote control? 2.Hoe power is supplied to infrared controller? 3.How logic circuit is made? I will heartly obliged if u wl sent me the answers as quickly as possible. Thanks

abdul hadi Infa-Red Remote Control Sunday, September 06, 2009 10:37:01 AM

to mercurt : please can u tell me which changes u made to make it work i have also built this circuit for the model making competition in college so pleaseeeeeeeee can u help me Thanks in advance

anonymous Infa-Red Remote Control Wednesday, August 05, 2009 1:09:55 PM

what is the wavelength of the IR LED?

Mercurt Infa-Red Remote Control Wednesday, July 15, 2009 12:58:39 AM

Thanks for the great circuit. It worked after I did some tuning of my own.. First the 1 megaohm didnt work for me so I had to find a suitable resistor that worked. Also a precise resistance is required from the resistance pot to make it work.. But overall it worked great.. Thanks again.. Keep it up..

RR S Infa-Red Remote Control Thursday, May 21, 2009 9:27:07 PM

I just went to the store ans asked for any phototransistor...The guy said I was crazy because he doesnt know what to sell me from the milluion parts he has. He asked for a part number...can someone give me the pert number they used or tried. The guy wouldnt even sell me a random one...I asked him but he refused. Please someone help me out.

anonymous Infa-Red Remote Control Thursday, May 07, 2009 10:04:24 PM

Could someone please help me. I am a beginner at this kind of stuff and I just want to make a one button simple IR remote. I have an IR receiver module. Is this an IR triggered switch in itself?

vijay Infa-Red Remote Control Thursday, February 05, 2009 2:45:30 AM

Its very nice.

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cynic	Infa-Red Remote Control	Tuesday, October 06, 2009 11:49:37 AM
to mercurt: please, I want your help about what resistor you substitute the 1megOhm? im also constructing this circuit as our project in data communication...please help me, thanks a lot in advance...
william	Infa-Red Remote Control	Sunday, October 04, 2009 10:24:45 PM
Is there a way to get more than one channel?
majid thakur	Infa-Red Remote Control for chanel latced bottan infa-red remote control	Tuesday, September 29, 2009 2:46:32 PM
Could someone please help me? I am a beginner at this kind of stuff and i want to make 4 Chanel infrared remote control, depending on the components. Each device output can be configured to be momentary (turned on while you press the button) or latched. Latched outputs can be toggled on/off by one button per channel, or turned on and off by two buttons per channel. i have one 4 x 8 Chanel schematic for infa-red remote control but that its never responded. You can see that web site (Peter’s electronic projects) DIY remote control based on PIC help me with schematic related part.
Bipin kumar	infrared remote control	Friday, September 18, 2009 1:10:32 AM
1.whether any programming is required for infrared remote control? 2.Hoe power is supplied to infrared controller? 3.How logic circuit is made? I will heartly obliged if u wl sent me the answers as quickly as possible. Thanks
abdul hadi	Infa-Red Remote Control	Sunday, September 06, 2009 10:37:01 AM
to mercurt : please can u tell me which changes u made to make it work i have also built this circuit for the model making competition in college so pleaseeeeeeeee can u help me Thanks in advance
anonymous	Infa-Red Remote Control	Wednesday, August 05, 2009 1:09:55 PM
what is the wavelength of the IR LED?
Mercurt	Infa-Red Remote Control	Wednesday, July 15, 2009 12:58:39 AM
Thanks for the great circuit. It worked after I did some tuning of my own.. First the 1 megaohm didnt work for me so I had to find a suitable resistor that worked. Also a precise resistance is required from the resistance pot to make it work.. But overall it worked great.. Thanks again.. Keep it up..
RR S	Infa-Red Remote Control	Thursday, May 21, 2009 9:27:07 PM
I just went to the store ans asked for any phototransistor...The guy said I was crazy because he doesnt know what to sell me from the milluion parts he has. He asked for a part number...can someone give me the pert number they used or tried. The guy wouldnt even sell me a random one...I asked him but he refused. Please someone help me out.
anonymous	Infa-Red Remote Control	Thursday, May 07, 2009 10:04:24 PM
Could someone please help me. I am a beginner at this kind of stuff and I just want to make a one button simple IR remote. I have an IR receiver module. Is this an IR triggered switch in itself?
vijay	Infa-Red Remote Control	Thursday, February 05, 2009 2:45:30 AM
Its very nice.