Adafruit
HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors
The HC-SR04 is an ultrasonic distance sensor that measures distances from approximately 2 cm to 400 cm (best results between 10–250 cm). Widely used in robot...
The HC-SR04 is an ultrasonic distance sensor that measures distances from approximately 2 cm to 400 cm (best results between 10–250 cm). Widely used in robotics, automation, interactive art, and motion sensing projects.
The sensor requires 5V power and the Echo return signal is 5V logic. Two 10 kΩ resistors are included for use as a voltage divider, converting the 5V Echo signal to a safe 2.5V for 3.3V devices like Raspberry Pi.
Specifications
- Sensor – HC-SR04 ultrasonic ranging module
- Range – 2–400 cm (effective: 10–250 cm)
- Power – 5V DC
- Trigger – 3.3V or 5V logic
- Echo – 5V logic (use included resistors as divider for 3.3V devices)
Compatible With
- Arduino
- Raspberry Pi (with voltage divider)
- CircuitPython and MakeCode
Package Contents
- 1× HC-SR04 ultrasonic sensor
- 2× 10 kΩ resistors
Jargon buster
Plain-language definitions for the technical terms used above.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
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