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L3G4200D three axis digital output gyroscope

K-TECHNICS
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KSh1,500.00

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The L3G4200D is a low-power, high-performance three-axis digital output gyroscope manufactured by STMicroelectronics. It measures angular velocity (rotational speed) across three axes: X (Pitch), Y (Roll), and Z (Yaw).
The original chip is obsolete, but it remains widely used by hobbyists, students, and engineers in the form of breakout module boards (like the GY-50). It has been largely succeeded by newer models like the L3GD20 and L3GD20H. 
Key Technical Specifications
  • Measurement Ranges (Full-Scale): User-selectable between ± 250, ± 500, or ± 2000 degrees per second (dps).
  • Resolution: 16-bit data output for each axis.
  • Sensitivity:
    • 8.75 mdps/LSB at ± 250 dps
    • 17.50 mdps/LSB at ± 500 dps
    • 70.00 mdps/LSB at ± 2000 dps
  • Communication Interfaces: Supports both I²C (up to 400 kHz) and SPI (up to 10 MHz) digital protocols. 
  • Operating Voltage: 2.4 V to 3.6 V for the raw IC. (Note: Commercial breakout modules usually incorporate an on-board voltage regulator allowing a 3.3 V to 5 V power input).
  • On-Chip Features: Embedded temperature sensor (8-bit output) and an integrated 32-level FIFO data buffer to offload data processing from the host microcontroller.
Common Breakout Module Pinout
Most hobbyist breakout boards expose the following standard pin layout:
Pin Name  Type Function / Wiring Destination
VCC / VIN Power Connect to 3.3V or 5V (depending on the board's built-in regulator).
GND Ground Connect to the microcontroller Ground (GND).
SCL / SPC Input Serial Clock line (I²C Clock / SPI Clock).
SDA / SDI I/O Serial Data line (I²C Data / SPI Data Input).
SDO / SA0 Output SPI Data Output / I²C Address selection bit.
CS Input Chip Select. Pull High (1) for I²C mode, Pull Low (0) for SPI mode.
INT1 / INT2 Output Programmable data-ready and threshold interrupts.
Typical Applications
  • Robotics & UAVs: Used for stabilization, flight controllers, balance control in bi-pedal/self-balancing robots, and Inertial Measurement Units (IMUs).
  • Gaming & VR: Tracks head or hand gestures for interactive inputs.
  • Dead Reckoning & Navigation: Complements GPS tracking in environments where satellite signal drops (e.g., tunnels, urban canyons).

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