ADXL345 Accelerometer

Bare ADXL345 accelerometer breakout for Klipper resonance testing. This small 3-axis digital accelerometer board is the direct-wired option for measuring printer vibration and tuning input shaper on Klipper machines.

Why use this board

• Uses the ADXL345 3-axis MEMS accelerometer: selectable ±2 g, ±4 g, ±8 g, ±16 g ranges with up to 13-bit full-resolution output.
• Supports SPI and I2C at the chip level; for Klipper resonance measurement, use SPI per Klipper's measuring-resonances guidance.
• Low-mass breakout board is easy to temporarily mount to a toolhead, bed, or carriage while tuning resonance.
• Includes the loose male pin header shown; soldering and wiring are required.

Specifications

• Sensor: ADXL345 3-axis digital accelerometer
• Measurement range: ±2/±4/±8/±16 g, user-selectable
• Resolution: fixed 10-bit or full-resolution mode up to 13-bit at ±16 g
• Digital interfaces: 3-wire SPI, 4-wire SPI, or I2C
• Breakout pins visible on the board: GND, VCC, CS, INT1, INT2, SDO, SDA, SCL
• Chip supply range from Analog Devices datasheet: 2.0–3.6 V; use 3.3 V unless your controller and module documentation explicitly confirm otherwise.

Printer fitment

Use it for Klipper input-shaper calibration on Voron, LH Stinger, and other Klipper-based 3D printers when you are comfortable wiring an accelerometer directly to a Raspberry Pi, Raspberry Pi Pico, or supported controller SPI bus.

Which accelerometer should you buy?

• Choose this ADXL345 breakout if you want the low-cost direct-wire board and do not mind soldering/crimping.
• Choose the KUSBA USB ADXL345 Accelerometer if you want a USB accelerometer instead of running SPI wires.
• Choose the LDO Input Shaper Toolkit if you want a more complete cabled input-shaper kit.

Gotchas

• This is not a USB accelerometer and it does not include a cable or printed mount.
• Klipper's ADXL345 resonance workflow expects SPI; I2C is too slow for that use case.
• Double-check power, ground, and SPI wiring before powering the printer electronics.