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51 SCM HC-SR04 Ultrasonic Range Finder Digital Tube Vehicle Collision Avoidance System Board
Description:
51 SCM + HC-SR04 ultrasonic sensor+ digital tube display+key+buzzer
Specification:
- SCM: STC89C52
- Can set slsrm distance
- Buzzer will alarm when the actual distance less than the setting distance
- Measuring range: 2-5cm
- Power: USB
Working principle of the module:
- IO trigger to measure range, high level signal for at least 10 us;
- Module automatically sent eight 40 KHZ square waves, automatically detect whether there is a signal
Return;
- Have returned signal, through the IO output high level,the duration of the high level is the time the ultrasonic wave is emitted from the return.
Package List:
- 1 x Ultrasonic Range Finder board
