Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 5V DC |
| Current Consumption | 15mA |
| 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 | 10g |
| Interface | 4-pin Header (VCC, Trig, Echo, GND) |
| Compatibility | Arduino, Raspberry Pi, STM32 |
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for robotics
Works great with Arduino Uno. Stable readings and easy to integrate into my smart car project.
Anonymous
Mar 07, 2026
Rating: 5/5
Beginner friendly
This is the standard module for learning ultrasonic sensing. Plenty of tutorials available online.
Anonymous
Mar 07, 2026
Rating: 3/5
Mixed bag
Bought a pack of 5. One unit was DOA, but the rest work fine. Customer service was helpful.
Anonymous
Feb 04, 2026
Rating: 5/5
Reliable sensor
Used this for a parking sensor project. Accuracy is decent for the price point and consistent.
Anonymous
Jan 21, 2026
Rating: 4/5
Good value
Works well for the price. Only giving 4 stars because the pins were slightly loose on one unit.
Q: Is there a library available for this?
A: Yes, many Arduino libraries support HC-SR04 out of the box, including the standard NewPing library.
Q: How many pins does it have?
A: It has 4 pins: VCC, Trigger, Echo, and Ground.
Q: What is the accuracy of the measurement?
A: Typically within 3mm under ideal conditions, though surface material can affect results.
Q: Can I use this with 3.3V logic boards?
A: Yes, but a voltage divider is recommended for the Echo pin to protect 3.3V boards from 5V signals.
Q: Can it work outdoors?
A: It can, but wind and temperature changes may affect accuracy. Best suited for indoor use.
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