Accurate • Affordable • Ideal for Educational Robotics Projects
Measures from ~2 cm to 400 cm with typical ±3 mm repeatability for classroom experiments and prototyping.
4-pin connection (VCC, GND, TRIG, ECHO). Works with Arduino, Raspberry Pi, ESP32, STM32, micro:bit in educational kits.
Explore obstacle avoidance, distance logging, and autonomous navigation in STEM activities.
| Parameter | Value |
|---|---|
| Operating Voltage | 5 V DC |
| Operating Current | ~15 mA |
| Sensing Range | ~2 cm – 400 cm (surface-dependent) |
| Typical Accuracy | ±3 mm (under ideal conditions) |
| Trigger Input | ≥10 µs TTL pulse |
| Echo Output | TTL pulse width proportional to distance |
| Module Dimensions | ~45 × 20 × 15 mm |
| Recommended Use | Educational or hobbyist environments only |
The HC-SR04 ultrasonic sensor lets learners investigate time-of-flight, signal timing, and environmental sensing while building practical Arduino, Raspberry Pi, ESP32, and micro:bit projects.
Its combination of accessibility and repeatability makes it a favorite for STEM classrooms, robotics clubs, and maker workshops. Use it to prototype obstacle avoidance, distance logging, or interactive installations.
| Operating Voltage | 3.3 V – 5 V DC |
|---|---|
| Channels | 3 (independent, adjustable) |
| Outputs | 3× Digital (active level varies by board) |
| Sensing Elements | IR LED + Phototransistor (per channel) |
| Detection Distance | Approx. 2–15 mm (surface-dependent) |
| Indicators | Per-channel status LEDs |
| Adjustments | 3× trim-pot threshold controls |
| Connector | VCC / GND / D1 / D2 / D3 |
| Recommended Use | Educational, R&D or hobbyist environments only |
| Statement | For educational laboratory and R&D use only.(non-RoHS). |
|---|---|
| WEEE | Not subject to WEEE marking; obligations apply to final equipment. |
| Manufacturer |
Little Muffins Things Limited 166 River Heights, 90 High Street London E15 2GQ littlemuffinsthings.com |
| EU Responsible Person |
eucomply OU Parnu mnt. 139b–141 13117 Tallinn, Estonia hello@eucompliancepartner.com |
