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This is the Freebird Logger wiki

The logger is intended for powering, digitizing and logging analog datastreams from turbulence microstructure probes such as a Rockland MicroSquid-c. The main features are:

• self-contained: on-board power, logic, storage, 24 hour run time when powering a MicroSquid.
• high-speed: 500 samples per second
• high resolution: 16 bit A/D converter
• analog signal input (a 0-5V signal is the primary sensor input)
• open design: schematics, pcb layout, firmware and support code available on github.

Additional features:

• IMU: can log accelerometer, gyro and compass synchronized with probe readings
• bluetooth: basic communication with a laptop. Not fast enough for data download, though.
• cheap: electronics total something like $120, plus 2-3 hours to solder.
• accurate real time clock: on-board clock has drift less than 0.1s/day, and samples are exactly synchronized to it.
• SD card storage: configuration and data are stored on standard SD card, enough storage for weeks of usage, and easy transfer to a computer.

User Guide

Design and Development

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