HC-SR04 Ultrasonic Distance Sensor
Standard 4-pin ultrasonic distance measuring sensor providing 2 cm to 400 cm non-contact measurement with 3 mm ranging accuracy.
Aliase:HCSR04, SR04, Ultrasonic Ranging Module
4-Pin Header (Bottom View)
4 Pins
Pinout Table4
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | VCC | Power | +5V DC Power Supply |
| 2 | Trig | Digital | Trigger Input (10µs TTL pulse to initiate ranging) |
| 3 | Echo | Digital | Echo Output (TTL pulse width proportional to distance) |
| 4 | GND | Ground | Ground (0V) |