A
Anonymous
Apr 03, 2026
Rating: 5/5
Great for school
Used this for my final year project. Documentation online is plentiful which helped a lot.
Description
Genuine HC-SR04 ultrasonic distance measurement module distance sensor compatible with wide voltage 3.3V 5V
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | DC 5V |
| Operating Current | 15mA |
| Operating Frequency | 40kHz |
| Measuring Range | 2cm - 400cm |
| Measuring Angle | 15 Degrees |
| Trigger Input | 10uS TTL pulse |
| Echo Output | TTL level signal |
| Dimensions | 45mm x 20mm x 15mm |
| Weight | 9g |
| Interface | 4-Pin Header |
5 reviews
A
Anonymous
Mar 04, 2026
Rating: 5/5
Perfect for Arduino
Works flawlessly with my Arduino Uno. Distance readings are consistent within indoor environments. Great value.
A
Anonymous
Mar 02, 2026
Rating: 5/5
Accurate enough
Using this for obstacle avoidance. Response time is quick enough for slow moving robots.
A
Anonymous
Feb 23, 2026
Rating: 4/5
Good but needs divider
Sensor works well but be careful connecting echo directly to 3.3V boards. Use a voltage divider for safety.
A
Anonymous
Jan 27, 2026
Rating: 3/5
One DOA
Bought a pack of 5, one was dead on arrival. The other four work fine. Customer service was helpful.
5 FAQ
Q: Is there a library available?
A: Yes, many Arduino libraries exist like NewPing.
Q: What happens if object is too close?
A: Readings below 2cm may be unstable or return 0.
Q: Can I use this with Raspberry Pi?
A: Yes, but ensure logic level shifting for the Echo pin.
Q: What is the accuracy?
A: Typically within 3mm under ideal conditions.
Q: Does it work underwater?
A: No, ultrasonic waves do not propagate well from air to water with this module.
