Description
Reviews
| 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 Signal | 10uS TTL pulse |
| Echo Output Signal | TTL level signal |
| Dimensions | 45mm x 20mm x 15mm |
| Weight | 8g |
| Interface | 4-Pin (VCC, Trig, Echo, GND) |
Anonymous
Mar 31, 2026
Rating: 5/5
Great for learning
Used this for my university robotics project. Easy to code and integrate with standard libraries.
Anonymous
Mar 28, 2026
Rating: 3/5
Sensitive to interference
Works well indoors but struggles with noise in my workshop. Shielding might be required.
Anonymous
Mar 26, 2026
Rating: 5/5
Reliable and cheap
Bought a pack of five. All worked out of the box. Highly recommended for prototyping.
Anonymous
Feb 05, 2026
Rating: 5/5
Perfect for STM32 projects
Works flawlessly with my STM32 board. Distance readings are consistent and easy to interpret.
Anonymous
Jan 20, 2026
Rating: 4/5
Good value sensor
Solid performance for the price. Just remember it needs 5V logic levels for best results.
Q: Can this run on 3.3V logic?
A: The module requires 5V power, but echo output is 5V. Use a voltage divider for 3.3V MCUs.
Q: Is there a library available?
A: Yes, many Arduino and STM32 libraries support HC-SR04 out of the box.
Q: What is the accuracy?
A: Typical accuracy is around 3mm under ideal conditions.
Q: Does it work underwater?
A: No, this is an air-based ultrasonic sensor. It is not waterproof.
Q: Can I use multiple sensors?
A: Yes, but ensure trigger pins are managed sequentially to avoid cross-talk.
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