Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Version | HC-SR04 Standard |
| Operating Voltage | DC 5V |
| Operating Current | 15mA |
| Ultrasonic Frequency | 40kHz |
| Measuring Range | 2cm to 400cm |
| Measuring Angle | 15 Degrees |
| Trigger Input Signal | 10uS TTL Pulse |
| Module Dimensions | 45mm x 20mm x 15mm |
| Interface Type | 4-Pin Header (VCC, Trig, Echo, GND) |
| Compatible Platforms | Arduino, Raspberry Pi, STM32 |
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect for Robotics
Works exactly as described. Used it for my obstacle avoidance robot and the readings are consistent.
Anonymous
Feb 13, 2026
Rating: 5/5
Accurate Distance
Tested against a tape measure and it was within 1cm accuracy.
Anonymous
Feb 09, 2026
Rating: 3/5
Sensitive to Noise
Works well indoors but struggles with background noise outdoors.
Anonymous
Jan 30, 2026
Rating: 4/5
Good Value
Quality is decent for the price. Wiring diagram could be clearer.
Anonymous
Jan 18, 2026
Rating: 5/5
Great for Students
Bought 10 for my classroom. All functioning perfectly.
Q: Can I use this with 3.3V logic?
A: Yes, but a voltage divider is recommended for the Echo pin to protect 3.3V boards.
Q: Can I use multiple sensors?
A: Yes, but ensure trigger pulses do not overlap to avoid interference.
Q: Is there a library available?
A: Yes, many open-source libraries exist for Arduino and Python.
Q: What is the minimum distance?
A: The minimum measurable distance is approximately 2cm.
Q: Is this module waterproof?
A: No, this module is not waterproof and should be kept dry.
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