DIY Ultrasonic Ranging Module Radar Alarm Kit Based on 51 Single Chip For Arduino

Note: This kit need to assemble, not supply instructions. Feature: 1, Key Description: From the first on the left, - key, + key, setting key. 2, SCM model: STC89C52. 3, Can set the alarm distance, press the set button, you can press plus, minus key, you can modify the alarm distance, and has power-off save function. 4, When the measured distance is less than the set distance, the buzzer will alarm. 5, The module measuring range: 5cm - 4m (test error: about 5%). 6, The design can be used as a car reversing radar. Specification: Input voltage: DC 4.5-5.5V Baseboard size: 6 * 7CM After adding the probe overall size is about 6 * 9 * 3cm Package list: 1 x PCB board 1 x HC-SR04 ultrasonic ranging module 1 x 0.56 inch 3 common anode digital tube 1 x 40P IC socket 1 x STC89C52 (programmed) 1 x DC005 socket 1 x USB to DC005 power cable 1 x AAA battery holder (batteries does not includes) 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 buttons 9 x 1K resistor 7 x 4.7K resistor 4 x 9012 transistor 3 x 22P ceramic capacitor 1 x 12M crystal 1 x 10UF electrolytic capacitor 1 x Shell kit Test, for reference only: