An infra-red LED is just like any other LED except the light it puts out falls in the infra-red rather than the visible region of the light spectrum and cannot therefore be seen by the human eye.
Infra-red LEDs are used in TV-style remote controls and their signals are received by infra-red receiver chips.
Infra-red LEDs can also be controlled by a PICAXE using the irout command and can be used to control TV and other equipment and be used to communicate between PICAXE.
This command will send an infra-red command which will make a Sony TV change channel (code 16, P+) once every five seconds. The infra-red LED should be connected to output pin B.1. The command is sent 10 times to ensure the TV has received and recognises the code as a hand-held TV remote normally does.
main: for b0 = 1 to 10 ; Send the command 10 times ... irout B.1, 1, 16 ; Send the command pause 45 ; Pause after each command sent next b0 pause 5000 ; Wait five seconds goto main ; RepeatCopy Code Submit an Example
An infra-red LED may be used via the IR LED module.
| Description | Code | Qty | |
|---|---|---|---|
| Infra-red LED (3mm) | LED023 | 1 | Buy Now |
| Infra-red LED (5mm) | LED021 | 1 | Buy Now |
| 330 ohm resistor (pack 100) | RES330R | 1 | Buy Now |
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