IR Remote Thyristor Power Controller

This project aims at controlling induction motor speed like fans, by operating a TV remote. The project uses a microcontroller of 8051 family that is interfaced to IR sensor. When any button on standard TV remote is pressed it sends certain coded data in infrared range to control board which is then collected by the IR sensor. Microcontroller receives the coded data, processes it and then provides delayed firing pulses to thyristor with the help of optical isolation mechanism. The loads are connected in series with the thyristor and power supplied to these loads is then controlled according to the received signal. The seven segment display is used to display the firing angle. Here in the project a lamp having varying intensity is used in place of motor that describes the varying power being supplied to motor. IR Remote thyristor power controller