This document describes a 4-channel infrared remote control system including both a transmitter and receiver. The transmitter uses an HT12A chip and infrared LED to transmit codes for 4 buttons. The receiver uses an HT12D chip and TSOP1738 infrared sensor to receive the codes and control 4 relays, with LED indicators for each relay and an overall power light. Jumpers are used to set the transmitter and receiver to the same address and select either momentary or latching function.