TTL level 2cm to 400cm high accuracy 3mm measuring ranging transducer distance 30 meter ultrasonic sensor hc-sr04

TTL level 2cm to 400cm high accuracy 3mm measuring ranging transducer distance 30 meter ultrasonic sensor hc-sr04

 Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit.

The basic principle of work:

(1) Using IO trigger for at least 10us high level signal,

(2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back.

(3) IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time×velocity of sound (340M/S) / 2,

 Wire connecting direct as following:

5V Supply

Trigger Pulse Input

 Echo Pulse Output

0V Ground

Electrical parameters: HC-SR04 Ultrasonic Module

Operating voltage: DC 5V

Operating Current: 15MA

Operating frequency: 40KHZ

Longest range: 4 m

Recent range: 2CM

Measuring angle: 15 degrees

Input trigger signal: 10uS TTL pulse

Output echo signal: TTL level output signal, proportional and range

Size: 45 * 20 * 15mm