Description
Reviews
| 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 |
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.
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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