Ir Remote Checker | Electronic Project Circuits

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Simple remote control tester circuit

When the remote control is not working, first check the battery before, It may be loss.If it is good,so detect transmit infrared light device.However, because the human eye can not see infrared light,so can not know how good or bad.But the photo transistor can use to detect infrared light.
This circuit so use this photo transistor is the light receiver from the remote control.If it is nice to have the bias current of the transistor BC558.It runs a current flows through the LED,so the LED bright.The remote control that works correctly. The variable resistor VR1 is used to adjust the sensitivity of the circuit.

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Categories: Detector, Meter Tags: ir remote checker, IR remote control Tester

IR Remote-Control Checker

Suitable for any Infra-red emitting device
3V battery supply
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 pushbuttons 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.

Parts:

R1_____________470K 1/4W Resistor
R2______________47R 1/4W Resistor

D1______________LED (Any dimension, shape and color)
Q1____________Infra-red Photo Transistor (Any cheap type)
Q2____________BC327 45V 800mA PNP Transistor
SW1____________SPST Toggle or Slide Switch (Optional, see Note)
B1_______________3V Battery (2 x 1.5V AA, AAA or smaller type Cells in series)

Note:
* 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.

Read more source: http://www.redcircuits.com/Page125.htm