Sensors — Wiring, Setup & Guides

Explore essential sensor modules for Arduino, Raspberry Pi, and Espressif (ESP32/ESP8266) platforms.
Each guide includes wiring diagrams, voltage notes, and short code examples to help you achieve accurate readings the first time.

HC-SR04 Ultrasonic Sensor

Measure distances from 2 cm to 400 cm with simple trigger-echo timing. Includes level-shifting tips for 3.3 V boards.

Triple IR Line Tracking Sensor

Three-channel reflective sensor for robot navigation and precise line following, with adjustable sensitivity and wiring notes.

Sensor Servo Bracket

Mount and pivot your HC-SR04 with an SG90 servo for scanning and obstacle detection. Includes assembly diagram.

For complete examples, visit our Project Resources — featuring classroom-tested builds, wiring diagrams, and ready-to-run sketches.