Description
Description
The GY-291 ADXL345 is a professional-grade, low-power, 3-axis accelerometer module designed for precise tilt, motion, and gravity sensing applications. At its core is the original ADXL345 integrated circuit from Analog Devices — not a clone, not a reclaimed chip, but factory-original stock. This guarantees consistent sensitivity, low noise, and long-term reliability for both prototyping and production use.
The module measures dynamic acceleration (motion, shock, vibration) and static acceleration (gravity, tilt). With selectable ranges of ±2g, ±4g, ±8g, or ±16g and 13-bit resolution at the highest range, it can detect inclination changes as small as 0.25 degrees. Communication is handled via I²C or SPI digital interfaces, making it compatible with 3.3V and 5V systems thanks to onboard voltage regulation and logic level shifting.
This version comes with pre-soldered pin headers for immediate breadboard or PCB integration. The “Original Chips” designation means you receive genuine ADXL345 dies from authorized supply chains — essential for applications where measurement accuracy and part traceability matter. Whether you are a hobbyist building a gesture-controlled robot or a business integrating vibration monitoring into industrial equipment, the GY-291 delivers trusted performance in a compact 21mm × 15mm package.
Key Features
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Original ADXL345 IC – Factory-original Analog Devices chip, not generic or refurbished.
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Wide Measurement Range – Selectable ±2g, ±4g, ±8g, or ±16g via software.
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High Resolution – 13-bit (at ±16g) for fine motion and tilt detection.
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Dual Digital Interfaces – I²C (up to 400kHz) and SPI (up to 10MHz) for flexible microcontroller integration.
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Ultra-Low Power – Consumes only 40µA in active mode, ideal for battery-powered IoT devices.
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Built-in Motion Detection – Free-fall sensing, tap/double-tap, activity/inactivity interrupts.
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Wide Voltage Compatibility – Operates on 3.3V to 5V with onboard level shifting.
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Ready to Use – Pre-soldered 2.54mm pin headers included (no soldering required).
Technical Specifications
| Specification | Value |
|---|---|
| Sensor Chip | ADXL345 (Original Analog Devices) |
| Operating Voltage | 3.3V – 5V DC |
| Communication | I²C (400kHz) / SPI (10MHz) |
| Acceleration Ranges | ±2g, ±4g, ±8g, ±16g (selectable) |
| Resolution | 13-bit (at ±16g) / 10-bit (at ±2g) |
| Sensitivity | 3.9 mg/LSB to 256 mg/LSB (range dependent) |
| Current Consumption | 40 µA (active), 0.1 µA (standby) |
| Module Size | 21mm (L) × 15mm (W) × 4mm (H) with headers |
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