MXY8000-7 photoelectric alarm and infrared remote control experimental instrument

1、 Instrument Introduction

Our company's independently developed MXY8000-7 photoelectric alarm and infrared remote control experimental instrument has two major 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 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 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.

2、 Product configuration

1 pair of infrared transmitting and receiving tubes

2. The infrared alarm can be equipped with one set of circuit components

3. STC89C52 microcontroller and its components 1 set

4. One set of infrared receiver HS1838 and its configurable circuit components

5. One infrared remote control

3、 Experimental purpose

1. Understand the working principle of infrared emission and reception tubes

2. Understand and master the working principle of infrared alarm circuit

3. Understand the decoding principle of infrared remote control

4. Further familiarize oneself with the programming and control circuit of the STC89C52 microcontroller

4、 Experimental content

（1） Principle experiment:

1. Voltage current characteristic experiment of infrared emitter tube

2. Infrared receiver tube dark current and photocurrent measurement experiment

3. Experiment on rectangular wave generation (using 555 chip)

4. Output experiment of AND gate circuit

5. HS1838 output measurement experiment

（2） Application experiments:

1. Single channel signal alarm and display experiment

2. Multi channel signal alarm and display experiment

3. Infrared Remote Control Decoding Experiment

4. Infrared remote control digital tube display digital experiment

5. Infrared remote control LED and buzzer control experiment