ADXL345 Triple Axis Linear Accelerometer Module

The ADXL345 is one of the most widely used motion sensors in hobby electronics because it packs a full 13-bit, up-to-16g digital accelerometer into a chip that sips only tens of microamps in measurement mode. This breakout exposes both I2C and SPI so it drops straight into an existing sensor bus without forcing a rewiring of a project. Builders use it for tilt-compensated compasses, step counters, drop-detection alarms, self-balancing robots, and camera-stabilization gimbals, since the onboard FIFO buffer can queue up to 32 samples and relieve the host microcontroller from having to poll continuously. Selectable measurement ranges of plus-or-minus 2g, 4g, 8g, and 16g mean the same board works for gentle orientation sensing as well as harder-impact shock logging, and its tap and double-tap detection logic can trigger an interrupt pin directly, cutting down on the software needed to react to a knock or shake.