IR Remote-Control Checker
Suitable for any Infra-red emitting device -- 3V battery supply
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)
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.
- 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.