Advertisement
infrared remote tester circuit diagram

Infrared Remote Tester

This is an infrared remote control tester circuit which gives both an audio and visual indication that a remote controller is functioning. D1 is a reverse biased photodiode which forms an IR detector.

It’s output is buffered by IC1a and then enters a pulse stretcher comprising C2, R2 and IC1b.
The pulse stretcher enables even the shortest of pulse trains to trigger the following oscilator. D3 is a low current red LED which provides the visual indication when the infrared remote is directed to the tester circuit.

An oscillator is formed of IC1c and IC1d which drives a piezo disc element X1. When an IR pulse is detected, IC1b goes low and the input of IC1d sees only a high impedance from the diode and oscillation starts. The input of gate IC1f is grounded for stability. The IR remote tester runs from a 9V PP3.

Article sent by Ian Johnson (Sw), thanks.

IR Remote Tester circuit diagram

infrared remote tester circuit diagram

No Comments

Join the conversation!

Error! Please fill all fields.
Looking for the latest from TI?