A
Anonymous
Mar 15, 2026
Rating: 3/5
Decent but Limited
Works indoors fine. Struggles with soft surfaces that absorb sound.
Description
Ultrasonic Module HC-SR04 Distance Measuring Module Ultrasonic Sensor Electronics DC5V
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | DC 5V |
| Operating Current | 15mA |
| Operating Frequency | 40Hz |
| Measuring Range | 2cm to 400cm |
| Measuring Angle | 15 Degrees |
| Trigger Input Signal | 10uS TTL pulse |
| Echo Output Signal | TTL level signal |
| Product Dimensions | 45mm x 20mm x 15mm |
| Item Weight | 10g |
| Interface Type | 4-Pin Header |
5 reviews
A
Anonymous
Mar 10, 2026
Rating: 5/5
Perfect for Robotics
Works great with my Arduino project. Accurate readings within the specified range.
A
Anonymous
Mar 04, 2026
Rating: 5/5
Reliable Module
Bought ten units for a class project. All functioned correctly out of the box.
A
Anonymous
Feb 21, 2026
Rating: 5/5
Fast Delivery
Arrived earlier than expected. Tested immediately and it measured distance accurately.
A
Anonymous
Feb 21, 2026
Rating: 4/5
Good Sensor
Value for money is excellent. Had to adjust code for timing but works well.
5 FAQ
Q: Can I use this sensor outdoors?
A: It is not waterproof. Outdoor use is possible only in dry conditions with protection.
Q: What is the accuracy of the measurement?
A: Typically within 3mm under ideal conditions. Surface texture affects results.
Q: How do I prevent interference with multiple sensors?
A: Trigger them sequentially rather than simultaneously to avoid cross-talk.
Q: Is there an Arduino library available?
A: Yes, many open-source libraries exist. You can also use the pulseIn function directly.
Q: Is this compatible with 3.3V systems?
A: Yes, but the Echo pin outputs 5V. Use a voltage divider to protect 3.3V GPIO pins.
