A
Anonymous
Mar 28, 2026
Rating: 5/5
Standard HC-SR04 quality
Exactly what I expected. Good build quality on the PCB.
Description
This ultrasonic sensor module enables non-contact distance measurement for robotics, automation, and obstacle avoidance projects. It utilizes high-frequency sound waves to detect object proximity with reliable accuracy suitable for various electronic circuits. The compact design facilitates easy integration into microcontroller systems like Arduino for real-time data feedback. Ensure proper voltage supply and clear line of sight between the transducers for optimal performance during operation.
Reviews
Attributes
| Brand | - |
| Category | Root / Electronic Components / Maker DIY |
| Origin | - |
| Working Voltage | DC 5V |
| Static Current | < 2mA |
| Working Frequency | 40Hz |
| 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 Header |
5 reviews
A
Anonymous
Mar 09, 2026
Rating: 3/5
Needed extra resistors
Works but needed voltage divider for 3.3V logic. Wish that was clearer in description.
A
Anonymous
Mar 05, 2026
Rating: 5/5
Perfect for Arduino Robots
Works flawlessly with my obstacle avoidance robot. Range is accurate up to 3 meters.
A
Anonymous
Feb 27, 2026
Rating: 4/5
Good value pack
Bought five for a project. One was slightly off calibration but overall great for the price.
A
Anonymous
Feb 16, 2026
Rating: 5/5
Reliable Sensor
Used this for parking sensor project. Response time is quick. Easy to wire.
5 FAQ
Q: Is there a library for ESP32?
A: Yes, many ultrasonic libraries support ESP32 out of the box.
Q: Can this run on 3.3V logic?
A: The module requires 5V power, but echo pin may need divider for 3.3V boards.
Q: What is the minimum detection distance?
A: The minimum measurable distance is approximately 2cm.
Q: Does it work outdoors?
A: It can be affected by wind and sunlight. Best used indoors or shielded.
Q: How many pins does it have?
A: Standard 4 pins: VCC, Trigger, Echo, and GND.
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