Photoelectric alarm and infrared remote control experimental instrumentIt has two main functions. One is the photoelectric alarm system, which converts light signals into electrical signals through photosensitive devices (infrared receiving tubes), controls the display of digital tubes and alarm circuits, and uses some digital logic circuits and microcontrollers to display the corresponding number of channels during the alarm process. The second is the infrared remote control system (remote control technology, also known as remote control technology, refers to the implementation of remote control of the controlled target, which is widely used in industrial control, aerospace, and home appliance fields. Infrared remote control is a wireless, non-contact control technology with significant advantages such as strong anti-interference/ability, reliable information transmission, low power consumption, low cost, and easy implementation. It is widely used in many electronic devices, especially household appliances, and is increasingly applied to computers. The system decodes the infrared remote control to realize various control circuits, such as digital display control, LED light emission control, buzzer switch control, etc.). The design of this instrument adopts a structure that can build circuit components, starting from design, installation, construction, debugging and other aspects, comprehensively improving students' hands-on and brainpower abilities and technical level.