This project was created to add shock and temperature logging for shipping sensitive equipment or remotely measuring acceleration of any dynamic system. The primary features and capabilities are as follows:

• 3 axis, low power accelerometer (LIS3DH, +/-16g)
• Teensy 3.5 MCU w/ integrated uSD card (Arduino IDE compatible)
• 4000mah Li-Ion battery ( 2+ week run time)
• Digital Temperature Sensor
• 100hz default logging frquency (configurable)
• Teensy 3.5 RTC with 3v button cell remembers date/time even when main battery is dead ( will last 5+years )
• Built in charging via standard micro USB cable and Li-Ion safety circuitry (overvolt, undervolt and temp)

 PRINTING AND ASSEMBLY

•  Use 3+ perimeters and 30% infill for a robust housing.
•  I used M2.5 threaded inserts that can be installed with a soldering iron ( https://amzn.to/32IKBJm )

MCU & ELECTRONICS

• Teensy 3.5 ( https://amzn.to/34Ndi9y )
• 3.3v Boost Converter ( www.sparkfun.com/products/10255 )
• Lithium Battery Charger ( www.sparkfun.com/products/10217 )
• 4400 mAh Battery ( https://amzn.to/32IUtmm )
• TMP36 Temp Sensor ( https://amzn.to/2ZYwxgN )
• LIS3DH 3-axis Accelerometer ( www.sparkfun.com/products/13963 )
• 3V CR1616 battery for RTC 

CODE & LIBRARIES

• The Arduino plugin from PJRC.com is the only requirement to use the Teensy with the Arduino IDE
• I'm still working on generating a beginner friendly configuration package, however in the short term anyone interested in replicating this project is welcome to message me for a link to the source code and libraries.

OUTPUT DATA AND FILES

• In its current configuration, the shocklogger generated two CSV files on its uSD card when running
• The first file is the ShockData.CSV and is formatted " MMDDYY HH:MM, X, Y, Z " for easy analysis in any spreadsheet application. By default, this file receives 100 lines a second.
• The second file is the TempData.CSV and is formatted " MMDDYY HH:MM, T". By default this file receives a new averaged Temp data point every 5 minutes.