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LoCoHead - The low-cost head tracker project
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Mathias Kreider, 2011
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LocoHead modules are approved for private and commercial use.
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LocoHead source code and hardware designs are for private use only,
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they may NOT be used in commercial software or designs.
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The purpose of this project
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The goal of LoCoHead is the realisation of a lean head tracking solution in
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software and hardware. It was based on the 3-axis LSM303DLH
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Magnetormeter / Accelerometer, including data processing and
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Output as a PPM or serial channel in order to control the actuators of camera mounts/gimbals.
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Version 0.1 utilises the Polulu breakout board with ATMEGA32L
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LoCoHEad - Pros
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- Very low price, especially compared to gyro-based systems
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- No Drift
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- pitch, roll and yaw axis, ie. all-natural movement of the head is covered
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- All sensor functions in one chip, no mechanical alignment / vertical boards needed
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- Simple interface
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- Easy sensor calibration
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- Open source software
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LoCoHead - Contra
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- influenced by magnetic interference
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- influenced by strong dynamic acceleration, esp Axial
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- Lower resolution of the yaw axis (+ / - 0.5%) than that of roll and pitch (+ / - 0.05%)
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Part of LoCoHead's code is based on the polulu example
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(see polulu_LICENCE.txt)