51Single Chip + HC-SR04 Ultrasonic Ranging Sensor Module Ultrasonic Range Finder Reversing Radar Ala

Descriptions: ? The ultrasonic range finder of single chip microcomputer is designed by single chip microcomputer + HC-SR04 ultrasonic sensor + digital tube + button + buzzer. ? 1. Button description: From the first one on the left, - button, + button, setting button. 2. Single-chip model: STC89C52/51, AT89S52 optional, default STC89C52. 3. The alarm distance can be set. After pressing the setting button, you can press the plus or minus button to modify the alarm distance and have the power-down save function. 4. When the measured distance is less than the set distance, the buzzer will alarm. 5. Module measurement range: 5cm--4m. 6. This design can be used as a parking sensor for automobiles. 7. Features of this design: Wide measurement range, stable, easy to operate, can be used after power-on. Input voltage: DC 4.5-5.5V The bottom plate size is 6*7CM The overall size after adding the probe is about 6*9*3cm ? Package Included: ? 1 x 51Single Chip + HC-SR04 Ultrasonic Ranging Module ? Noted: This is the assembled module, here is the list of electronic components: 1 x PCB board 1 x HC-SR04 ultrasonic ranging module 1 x 0.56 inch 3-digit common digital tube 1x 40P IC socket 1 x STC89C52 (burning program) DC005 seat 1 1 x USB to DC005 power supply line 1 x 7 3 battery pack 1 x 5V active buzzer 1 x 5MM red LED 1 x 8*8 self-locking switch 1 x 8*8 self-locking switch cap 3 x 6*6*12 button 9 x 1K resistor 7 x 4.7K resistor 4 x 9012 triode 3 x 22P ceramic capacitor 1 x 12M crystal 1 x 10UF electrolytic capacitor