555 multi-function infrared remote control

Infrared sensing system is a measurement system using infrared medium. According to the function, it can be divided into five categories. According to the detection mechanism, it can be divided into photon detector and heat detector. Infrared sensing technology has been obtained in the fields of modern technology, national defense, industry and agriculture. A wide range of applications.
The 555 timer is mainly composed of a resistor and a capacitor to form a charge and discharge circuit, and two comparators are used to detect the voltage on the capacitor to determine the level of the output level and the on/off of the discharge switch. This makes it convenient to construct a delay circuit from microseconds to tens of minutes, which can conveniently constitute a monostable flip-flop, a multivibrator, a Schmitt trigger, or the like, or a waveform transform circuit. The figure below shows the multi-function infrared remote control circuit.

Multi-function infrared remote control circuit diagram