Infrared based schematics

40khz IR Tester

Infrared transmitter for locomotives

40KHz light receiver (PDF)

IR detector

40KHz TV-VCR repeater (PDF)

IR Link

555 timer 40khz IR Oscillator

IR remote control extender

An Ambient-Light-Ignoring Infrared

IR Remote Control Extender Circuit (Mark 2)

Build an Infrared night scope

IR Remote Control Extender Circuit (Mark 3)

Computerized Infrared Remote

IR remote control tester

Digibox interface

iRDA transceiver to extend IR port

Fire-Stick infrared remote control

Micro based PIR to IR remote converter

General purpose IR receiver

Implementing Infrared Object Detection

Improved infrared receiver for PC

Pyroelectric Infrared Sensor

Infra Red Switch

Serial port controller infrared transmitter

Infrared body heat detector

Simple infra-red detector

Infrared circuits for remote control

Simple infrared remote control

Infrared gate for door

Simple IR transmitter circuit

Infrared level detector

Simple on-off IR photoswitch

Infrared link for 10-BASE-T

Stereo IR audio receiver

Infrared switch using any infrared remote control

Wireless IR headphone receiver

Infrared Transmitter and Receiver

Wireless IR headphone transmitter