Ultrasonic distance alarm kit

Description

Ultrasonic distance alarm kit, can measure the distance to an object with HC-SR04 ultrasonic sensor and give alarm. The alarm distance can be set. After pressing the setting button, you can press the plus or minus keys to change the alarm distance, and it has the function of saving after power failure. When the measured distance is less than the set distance, the buzzer will alarm

Ultrasonic distance alarm kit specifications:
– Microcontroller: STC89C52
– Measuring range: 5cm-4m
– Input voltage: DC4.5-5.5V

Ultrasonic distance alarm kit contents:
– PCB board * 1
– HC-SR04 ultrasonic ranging module * 1
– 0,56” 3-digit Gongyang Nixie tube * 1
– 40P IC connector * 1
– STC89C52 (burned program) * 1
– DC005 chair * 1
– USB to DC005 power cord * 1
– No. 7 battery with 3 cells * 1
– 5V active buzzer * 1
– 5MM red LED * 1
– 8*8 self-locking switch * 1
– 8*8 self-closing switch cover * 1
– 6*6*12 buttons * 3
– 1K resistor * 9
– 4.7K resistor * 7
– 9012 transistor * 4
– 22P ceramic capacitor * 3
– 12M crystal oscillator * 1
– 10UF electrolytic capacitor * 1
– USB to DC005 power cord * 1
– Battery holder * 1
– Acrylic shell set * 1
– Fixed screw set * 1