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IR receivers
Infrared technology is as old as the world. In fact, it is literally so because infrared waves reach us from the sun. When it comes to technology, infrared waves can be found, for example, in TV remote controls, not the current ones, but those produced many decades ago. Currently, infrared technology is much more modern.
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Infrared receivers - FAQ
An IR receiver (infrared receiver) is an electronic element that enables the reception of a signal transmitted using electromagnetic radiation waves in the infrared band.
The infrared receiver is used to receive signals from IR transmitters. They are used, for example, in remote controls for electronics and household appliances, robots and electronic equipment.
It is best to do this by connecting the receiver according to the diagram and sending a signal from the diode to it, and then reading the changes in the output signal with a meter .
The simplest way is to look at the IR diode through the smartphone's camera, which records infrared radiation - the working diode will glow in its lens.