@▷ How to build Infrared Remote Tester | Diagram for Schematic

How to build Infrared Remote Tester

Description

A very simple device allowing a quick check of common Infra-red Remote-Controls can be useful to the electronics amateur, frequently asked to repair or test these ubiquitous devices. A reliable circuit was designed with a handful of components: the LED will flash when any of the Remote-Control push buttons will be pressed. The side of the Remote-Control bearing the IR emitting diode(s) must be directed towards the Photo Transistor (Q1) of the checker circuit: maximum distance should not exceed about 20 - 25cm.

Circuit Diagram:

Circuit Diagram

Parts:

  • R1 = 470K
  • R2 = 47R
  • D1 = LED Any Type
  • Q1 = Photo Transistor
  • Q2 = BC327
  • B1 = 3V Battery or 2 AA cell

Notes:

  • Current drawing of the circuit is less than 1mA when the LED illuminates and 0mA when no signal is picked-up by the Photo Transistor: therefore, SW1 can be omitted.
  • SW1 will be SPST Toggle or Slider Switch
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