HC-SR04 ultrasonic distance sensor for measuring range with a trigger/echo interface in robotics, automation and proximity projects.
HC-SR04 ultrasonic distance sensor for measuring range with a trigger/echo interface in robotics, automation and proximity projects.
5 V power input
ultrasonic trigger input
ultrasonic echo pulse output
common ground
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | 1 | power | 5 V power input | 5V |
| TRIG | 2 | digital input | ultrasonic trigger input | 3V or 5V logic accepted per Adafruit product text |
| ECHO | 3 | digital output | ultrasonic echo pulse output | 5V logic output, use divider for 3V controllers |
| GND | 4 | ground | common ground | 0V |
I2C · SPI · Single data line · 3.3 – 5 V · Breakout
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