Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | DC 5V |
| Static Current | < 2mA |
| Measuring Angle | 15 degrees |
| Measuring Range | 2cm - 400cm |
| Resolution | 0.3cm |
| Trigger Input Signal | 10µS TTL pulse |
| Dimensions | 45mm x 20mm x 15mm |
| Interface Type | 4-Pin Header (VCC, Trig, Echo, GND) |
| Compatibility | Arduino, Raspberry Pi, STM32 |
| Package Weight | 8g |
Anonymous
Mar 28, 2026
Rating: 5/5
Standard industry component
The HC-SR04 is a classic for a reason. This specific module performs up to spec. Accuracy is good enough for most hobbyist applications.
Anonymous
Mar 24, 2026
Rating: 5/5
Perfect for my robotics project
This sensor works flawlessly with my Arduino Uno. The distance readings are consistent and accurate within the specified range. Great value for the price.
Anonymous
Mar 21, 2026
Rating: 5/5
Fast shipping, works great
Arrived quickly and well-packaged. Connected it to my smart car chassis and the obstacle avoidance logic works smoothly. No issues so far.
Anonymous
Mar 17, 2026
Rating: 4/5
Easy to use for beginners
As someone new to electronics, I found this very forgiving. Plenty of code examples available online. Took me about 20 minutes to get it running.
Anonymous
Mar 03, 2026
Rating: 5/5
Reliable and durable
I have bought ten of these for a classroom set. They have survived multiple drops and wiring mistakes by beginners. Highly recommended for education.
Anonymous
Mar 02, 2026
Rating: 4/5
Good budget sensor
Does exactly what it says. Setup was easy following online tutorials. Only downside is it can be a bit jittery at the maximum range, but perfect for obstacle avoidance.
Q: Is a library required to use this with Arduino?
A: No, you can write the code manually using pulseIn(), but many users prefer using existing libraries to simplify the process.
Q: How many wires do I need to connect?
A: You need to connect 4 wires: VCC (Power), GND (Ground), Trig (Trigger), and Echo (Output).
Q: Does this work outdoors in sunlight?
A: Yes, ultrasonic sensors are generally unaffected by ambient light, so they work well both indoors and outdoors.
Q: What is the minimum detection distance?
A: The minimum measurable distance is approximately 2cm. Objects closer than this may not be detected accurately.
Q: Can this sensor work with 3.3V logic levels?
A: Yes, but you may need a voltage divider or level shifter for the Echo pin to safely interface with 3.3V microcontrollers like some Raspberry Pi models.
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