Jap's electronic projects Jap's electronic projectsInfrared remote controls are using a 32-40 kHz modulated square wave for communication. These circuits are used to transmit a 1-3 kHz digital signal through infra light. The transmitter oscillator which is driving the infrared transmitter LED can be turned on/off by applying a TTL voltage on the MOD input. On the receiver side a photodiode takes up the signal. The integrated circuit inside the chip is sensitive only around a specific frequency in the 32-40 kHz range. The output is the demodulated digital input, just what we used to drive the transmitter. When the carrier is present, this output is high. When no carrier is detected, the output is low.
Stefan Ovidiu writes that if you'd need a low power device, replace the NE555 IC with an ICM7555 (the CMOS equivalent of 555) or use a quad NAND CD4011 to build a gated oscillator.
Here is a sample list of receiver chips.
| device | manufacturer | pinout | notes |
| GP1U52X | Sharp | 1=OUT 2=VCC (+5VDC) 3=GND |
38 kHz |
| IS1U60L | Sharp | 1=VOUT 2=GND 3=VCC (+5VDC) |
60 kHz output is inverted (LOW when carrier present) |
| TSOP17xx | Vishay | 1=GND 2=VCC (+5VDC) 3=OUT |
30, 33, 36, 36.7, 38, 40, 56 kHz output is inverted (LOW when carrier present) |
| TSOP18xx | Vishay | 1=OUT 2=GND 3=VCC (+5VDC) |
30, 33, 36, 36.7, 38, 40, 56 kHz output is inverted (LOW when carrier present) |
For a remote control application of these circuits, please check my encoder/decoder circuit.
| name | value |
| R1 | 1k |
| R2 | 15-22k use a 15k resistor series with a 10k potmeter to adjust frequency in the 32-40kHz range |
| R3 | 15 @5VDC, 200 mA peak 35 @9VDC, 200 mA peak 50 @12VDC, 200 mA peak |
| C1 | 1n |
| C2 | 47n |
an older IR receiver design of mine is available, but it is only for detecting, not decoding a modulated IR signal.
| posted by Arif on 2001-10-16 01:09 |
| Dear sir, I have been trying to build an infra-red remote control reciver, using 880nm diodes to recieve pulses. what is the schemtics for this.what does the 1st stage ampilification looks like?
please help |
| posted by kenneth on 2001-10-12 11:47 |
| hello, i need a high frequency transmitter/receiver + the schematics of the product. and i need it as soon as possible. it's very important for me. thanks in advance. kenneth
HELP ME!!!!! |
| posted by rhenzhet martin on 2001-10-11 12:44 |
| Good Day!
sir,can you please send us more information about GP1U52x because we are doing a project about Infrared Remote Control System.PLEASE send us the configuration of Infrared Receiver in full details using GP1U52X. Please....please help us. Thank you very much and God Bless! thanks, rhenzhet |
| posted by jo fernandez on 2001-10-10 02:44 |
| HI, YOUR PAGE IS MY DAY SUNSHINE, I REALLY APPRECIATE YOUR IDEAS.
THIS IS THE BEST FOR EVERY ELECTRONIC ENTHUCIAST.BY THE WAY I'M ONLY A BEGINNER TO THIS THINGS SO IF YOU CAN PLEASE SEND ME AN ON/OFF LOGIC CIRCUIT WITH NON- LATCHING START BUTTON AND A LATCHING OUTPUT.THATS ALL THANK YOU VERY MUCH AND GOD BLESS YOU AND YOUR FAMILY CIRCLE. |
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| posted by al d. horteza on 2001-08-28 12:29 |
| This site is very helpful, not only to my part, but also to the side of my co-students especially in Engineering Field. As of now Sir, I am looking for schematic diagram on Transmitter-Receiver Control System with the use of an Infrared. Could you please help me to have this one. I hope Sir you can help me. Your help would meant so much for me. And I thank God for having been visited to your site. Can I consider this as a great favor? I will wait for your immediate response. Continue to aid your help and God will do the rest. Good Luck for your job and May The Good Lord Bless and Keep You Always. Thank you so much..... |
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| posted by ying on 2001-08-23 14:35 |
| looking 4 help in a project- infra-rad remote control button. how to do serial interface with rs232 to the printer port? help needed urgently!!! thanks |
| posted by arun patel on 2001-08-23 11:30 |
| dear sir,
i need a high frequency infrred transmeter can u help me please sand me the schematic of that as posiabl as high frequency arun |
| posted by arun patel on 2001-08-23 11:24 |
| dear sir,
please sand me a schematic digram of a high frequency infrared remote controll transmeter about 100 mhz in my e-mail address then i will great full to u your ---arunpatel |
| posted by hannsin on 2001-08-12 21:04 |
| hi,
sorry for my ignorance, but can you teach me more about the output waveform of GP1U52X, i am doing a project on MC68HC11 and i'm using the E1 chip, i have MAX232 to connect to my pc, so do you have any samples of how to connect the GP1U52X to my micro controller? i want to sense my Philips remote control, recognize all the keys and just send it to my pc through serial port.... thanks a lot, this is urgent.... |
| posted by Siddharth Singh on 2001-07-28 11:24 |
| The circuit is good for transmitting pulses. but can we use it for transmitting
audio signals.... especially DTMF signals. If yes , what modifications should be carried out in the original circuit? Please Help! Thanks |
| posted by rama nageswara rao on 2001-07-23 08:15 |
| good ????????? |
| posted by Md. Abdur Rahim on 2001-07-16 13:14 |
| please send me the configuration in details. Please make hurry. please please . |
| posted by Stefan Ovidiu on 2001-06-05 14:09 |
| Hi,
It works fine. I make RX and TX whit 12C508 and IR. Whit 555 you have just one problem: the power consumption (9mA). You can make the transmitter whit HEF4011 (CMOS = low power), and command the LED whit one transistor, or replace NE555 whit ICM7555 (NE555 in CMOS type).Anyway it's very interesting and have a lot of applications. You know the universal infrared receiver for PC (serial COM)? |
| posted by mishail on 2001-05-15 03:20 |
| Hi there, i realy liked you circuit and you made it so simple, thank you for your work.
but would mind if you tell me how far a part could be between transmitter and receiver? thank you and have a good day |
| posted by george on 2001-04-09 12:50 |
| Hi there
We are 3rd year electronic eng students,and are looking for info on a transmitter control circuitry ,we have a transmitter circuit but need to know how to encode for serial transmission. this is for a infra red fan that has 3 speed settings. Any suggestions or help would be appreciated. Thanks |
| posted by Adam Peard on 2000-07-24 08:09 |
| This has been an excellent insight to the switch circuitry. Ideally I want to make a door minder that can log numbers of people in a room at any one time. I also need the transmitter specs. Do you have any suggestions on where I can find this?.
Thanx, |
