Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | DC 5V |
| Static Current | < 2mA |
| Measuring Angle | 15 degrees |
| Measuring Range | 2cm - 400cm |
| Resolution | 0.3cm |
| Trigger Input Signal | 10µS TTL pulse |
| Echo Output Signal | TTL level signal proportional to distance |
| Dimensions | 45mm x 20mm x 15mm |
| Mounting Hole Diameter | 2mm |
| Compatible Platforms | Arduino, Raspberry Pi, STM32 |
Anonymous
Mar 29, 2026
Rating: 3/5
Works but needs calibration
The module functions, but the readings were slightly off initially. I had to add a calibration factor in my code to get precise measurements. Once calibrated, it's been stable.
Anonymous
Mar 28, 2026
Rating: 5/5
Easy to use for beginners
Bought this for my son's science fair project. The documentation online is plentiful, and we got it working within an hour. It reliably detects walls and furniture.
Anonymous
Mar 27, 2026
Rating: 4/5
Good value but sensitive to angles
Great sensor for the price. It works well for straight-on detection, but I noticed it struggles a bit if the object is at a sharp angle. Still, for basic collision avoidance, it does the job perfectly.
Anonymous
Mar 23, 2026
Rating: 5/5
Reliable and compact
I've used several brands of HC-SR04 modules, and these are consistent. The size is small enough to fit on my custom drone frame without adding too much weight. Highly recommended.
Anonymous
Mar 12, 2026
Rating: 5/5
Standard component, great quality
This is the industry standard for a reason. Solid build quality, clear pins, and consistent performance. I ordered ten for a classroom set, and all of them work perfectly.
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for my robotics project
This ultrasonic sensor works flawlessly with my Arduino Uno. The range is accurate up to about 3 meters, which is exactly what I needed for my obstacle avoidance robot. Setup was straightforward using standard libraries.
Q: Does this come with jumper wires included?
A: No, the package includes only the ultrasonic module itself. Jumper wires are sold separately.
Q: Is this sensor waterproof for outdoor use?
A: No, this module is not waterproof. It should only be used in dry, indoor environments or protected enclosures if used outdoors.
Q: What is the minimum distance this module can detect?
A: The minimum measurable distance is approximately 2cm. Objects closer than this may not be detected accurately or at all.
Q: How do I handle multiple sensors on one project without interference?
A: To avoid crosstalk, you should trigger each sensor sequentially rather than simultaneously. Add a small delay (e.g., 60ms) between triggering different sensors.
Q: Can this sensor be used with a 3.3V logic system like ESP32?
A: Yes, but you may need a voltage divider or a logic level converter for the Echo pin, as the module outputs 5V TTL signals which can damage 3.3V GPIO pins.
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