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References: Motion, Orientation, and Light Sensors

  1. Accelerometer - Wikipedia - Explains how MEMS sensors measure acceleration and detect tilt and gravity. Directly supports this chapter's ADXL345 orientation work.

  2. Inertial measurement unit - Wikipedia - Describes how accelerometers and gyroscopes combine to track motion and orientation. Background for the chapter's motion-sensing concepts.

  3. Magnetometer - Wikipedia - Covers how sensors measure magnetic fields to find compass heading. Reinforces the chapter's HMC5883L compass section.

  4. Make: Sensors - Tero Karvinen, Kimmo Karvinen & Ville Valtokari - Maker Media - Hands-on projects with accelerometers, light sensors, and more that parallel this chapter's experiments.

  5. Practical Electronics for Inventors (4th Edition) - Paul Scherz & Simon Monk - McGraw-Hill - Detailed coverage of sensor electronics for students wanting deeper theory behind the chapter's motion and light sensors.

  6. Adafruit ADXL345 Accelerometer - Adafruit - Guide to the triple-axis accelerometer used in this chapter, with wiring and code. Reinforces reading tilt and gravity values.

  7. PIR Motion Sensor Tutorial - Last Minute Engineers - Explains how passive-infrared sensors detect movement, with adjustable sensitivity and timing. Supports the chapter's motion-detection examples.

  8. APDS-9960 Gesture and Color Sensor - SparkFun - Hookup guide for the gesture, proximity, and color sensor featured in this chapter. Covers I2C wiring and example readings.

  9. Photocell Hookup Guide - SparkFun - Explains light-dependent resistors and the voltage divider that turns light into an analog value. Reinforces the chapter's light-sensing section.

  10. machine.I2C - MicroPython - Reference for the I2C bus used to read the accelerometer and compass. Connects the chapter's sensors to working MicroPython code.