Anonymous
Mar 28, 2026
Rating: 5/5
Standard HC-SR04 quality
Exactly what I expected. Good build quality on the PCB.
Description
Reviews
| 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 |
Anonymous
Mar 28, 2026
Rating: 5/5
Standard HC-SR04 quality
Exactly what I expected. Good build quality on the PCB.
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.
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.
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.
Anonymous
Feb 16, 2026
Rating: 5/5
Reliable Sensor
Used this for parking sensor project. Response time is quick. Easy to wire.
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.