Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Static Current	< 2mA
Measuring Angle	15 degrees
Measuring Range	2cm to 400cm
Resolution	0.3cm
Pin Count	5 Pins (VCC, Trig, Echo, GND, OUT)
Trigger Input Signal	10µS TTL pulse
Dimensions	45mm x 20mm x 15mm
Weight	8 grams
Included Items	Sensor Module, Jumper Wires, PDF Documentation

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Excellent documentation included

Unlike other sellers, this package actually includes clear PDF guides and example code. It made integrating the HY-SRF05 into my final year project much easier. Highly recommended for students.

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect for robotics projects

This sensor works flawlessly with my Arduino Uno. The range is accurate up to about 3 meters in my testing, and the documentation provided was very helpful for getting started quickly.

Anonymous

Mar 25, 2026

Rating: 4/5

Good value, slight noise at max range

Great little module for the price. It performs well within the 2cm to 300cm range. I noticed some fluctuation when measuring objects near the 400cm limit, but for most hobby applications, it is more than sufficient.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and consistent

I bought ten of these for a workshop. All units performed consistently right out of the box. The 5-pin layout is standard and easy to wire up on a breadboard.

Anonymous

Mar 11, 2026

Rating: 5/5

Easy to use for beginners

As someone new to electronics, I found this sensor very forgiving. The trigger and echo pins are clearly labeled, and the online community support for this specific model is huge.

Anonymous

Mar 07, 2026

Rating: 4/5

Works well for obstacle avoidance

Using this on a custom drone build for low-altitude obstacle detection. Response time is fast enough for slow-moving robots. Just ensure you have a stable 5V power supply.

5 FAQ

Q: What is the beam angle of the ultrasonic waves?

A: The measuring angle is approximately 15 degrees. This means it detects objects within a cone shape extending from the sensor face.

Q: Can this sensor work underwater?

A: No, this module is not waterproof and is designed for air-based ranging only. Ultrasonic waves also behave differently in water, requiring specialized transducers.

Q: Does the included documentation have code examples for Raspberry Pi?

A: The primary documentation focuses on Arduino C++ examples. However, the timing principles are the same, and many users have successfully adapted it for Python on Raspberry Pi using GPIO libraries.

Q: How do I handle the 'OUT' pin on the 5-pin configuration?

A: On many HY-SRF05 variants, the 5th pin (OUT) is an optional overflow indicator that goes high if the distance exceeds the measurable range. It can often be left unconnected for basic usage.

Q: Is this compatible with 3.3V logic microcontrollers like the ESP32?

A: Yes, but you may need a voltage divider or level shifter for the Echo pin output, as the sensor operates at 5V. The Trig pin can usually be driven directly by 3.3V logic.

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