InfraRed, PIR and Similar Devices

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Mobile Infra Red Transmitter

A MIRT is a device that uses Infra Red technology to trigger Pre-Emptive sensor on a traffic light and causes the light to change to green. Usage of this circuit may not be permitted in your locality.

http://www.i-hacked.com/index.php?option=content&task=view&id=176

Simple IR transmitter circuit

http://www.tkk.fi/Misc/Electronics/circuits/ir_send.html

Pyroelectric Infrared Motion Sensor

http://www.web-ee.com/Schematics/PIR/pir.htm

Stereo IR audio receiver

http://circuitos.tripod.cl/schem/r37.gif

Serial Port IR Receiver

AVR-Based

http://www.happy-beginnings.de/IR/

Universal Infrared Receiver

This is an UIR compatible infrared remote controller receiver that plugs to PC serial port. It is implemented using IR remote receiving module and PIC16F84. This device can be used for example with Girder software to control your PC.

http://digilander.libero.it/alfred73/eprojects.htm#Universal Infrared Receiver