There are 74 circuit schematics available. Last circuit added on Tuesday, 19 May 2015.

CircuitCategoryDate AddedOK?
Infrared beam door alarmIR 
Simple Infa-Red Remote ControlIRJun 26, 2009
IR Remote Control Extender CircuitIRJun 26, 2009
IR Audio linkIRJul 05, 2012
Wireless IR headphone transmitterIRJun 28, 2009
Wireless IR headphone receiverIRJun 28, 2009
IR illuminator for night-vision tv cameras and scopesIRJun 28, 2009
Infra Red Switch that works with commonly available remote controlsIRJul 05, 2012
Infra Red Remote Control Extender (Mark 1)IRJul 05, 2012
IR Remote Control Extender Circuit (Mark 2)IRJul 05, 2012
IR Remote Control Extender Circuit (Mark 3)IRJul 05, 2012
IR Remote Control Extender Circuit (Mark 4)IRJul 05, 2012
IR Remote Control Extender Circuit (Mark 5)IRJul 05, 2012
Infrared Remote Control that operates on 115 volts ACIRJul 05, 2012
Infrared remote control tester using a SFH2030 photodiode and a CA3140 operational amplifierIROct 19, 2009
Infrared Proximity Detector based on Vishay TSOP4830IR 
Infrared Receiver Module SchematicsIRSep 10, 2006
Infrared gate for doorIRMar 23, 2003
Infrared circuits for remote controlIRMar 23, 2003
Serial port controller infrared transmitter (PIC16F628)IRMar 23, 2003
Learning IR remote control receiver using a PIC16F628IRApr 12, 2014
Infrared object detector using a PIC12F629 microcontrollerIRMay 16, 2010
Remote infrared terminal for projects requiring IR communicationsIRMay 24, 2010
Digibox interface circuit diagramIRAug 09, 2002
Infa-Red Remote ControlIRSep 01, 2009
IR Remote Control JammerIRSep 01, 2009
Universal Serial Infrared ReceiverIR 
Infrared motion detector circuitIRNov 13, 2010
Inexpensive infrared reflectometerIR 
40KHz light receiver (PDF)IRJan 26, 2001
40KHz TV-VCR repeater (PDF)IRJan 26, 2001
Infrared proximity detector based on Microchip PIC12C508 or PIC12C509IRAug 17, 2009
Micro based PIR to IR remote converterIROct 23, 2002
IR-related ASCII Schematics V1.00IRAug 27, 2003
Infrared remote transponderIRJan 26, 2001
Build an Infrared night scopeIRJan 26, 2001
Decoding IR Remote ControlsIRJan 26, 2001
IR detectorIRJan 26, 2001
PC IR Remote Control HardwareIRAug 27, 2003
Infra-red Light Barrier Using 555IRNov 13, 2010
Infra-Red Sensor/MonitorIRNov 13, 2010
Infrared S/PDIF ReceiverIRNov 13, 2010
RC5 Repeater to extend distance of infrared remote controlsIRNov 13, 2010
Infrared beam barrier / proximity detectorIR 
iRDA transceiver to extend IR port range up to 15 metersIRFeb 21, 2005
IR remote control testerIRFeb 21, 2005
Simple IR transmitter circuitIRJan 26, 2001
Simple infra-red detectorIRJan 26, 2001
Direction sensing infrared motion detector using PIR (PDF)IR 
Infrared Motion Detector using a PIR sensor (PDF)IR 
Pyroelectric Infrared (PIR) SensorIRJan 26, 2001
Measuring the speed of light with an infrared LED / photodiode (TDOA)IRJun 13, 2011
FAN Thermostat controlled by IR remote controllerIRMay 19, 2015
High power infrared remote control to turn off television sets from a distanceIROct 12, 2009
Infrared Body SensingIRJan 09, 2010
Project to capture infrared remote control signals and play them back, based on Atmel ATMEGA48 microIRJan 17, 2010
Infrared lampIR 
40khz IR Tester circuit diagramIRJan 26, 2001
555 timer 40khz IR OscillatorIRJan 26, 2001
Basic IR detector / emitter circuit diagramIRJan 26, 2001
DVD thermometer - display temperature on TV by remotely controlling DVD player by infraredIR 
Infrared Transmitter Project Implemented on a Solderless BreadboardIRNov 02, 2010
Infrared headphone system (includes transmistter and receiver schematics along with vero layout)IRAug 17, 2009
Implementing Infrared Object DetectionIRJan 26, 2001
Remote control uses an IR receiver chip to receive the IR signal from the remoteIR 
Infra Red SwitchIRNov 27, 2002
IR remote control extenderIRJan 26, 2001
IR Remote Control Extender Circuit (Mark 2)IRNov 27, 2002
IR Remote Control Extender Circuit (Mark 3)IRNov 27, 2002
Infra Red wired Repeater circuit to control appliances from a remote locationIR 
IR LinkIRNov 27, 2002
Basic infrared link for audio communication over distances up to 3 metresIRFeb 05, 2010
IR remote control testerIRJan 26, 2001
Computerized Infrared RemoteIRAug 27, 2003