As of March 1st, 2011, the Logomatic now ships with the MCP73831 battery charger IC instead of the hard-to-find MAX1555.
The highly popular Logomatic v2 from SparkFun uses a USB mass storage stack to appear under any operating system as a flash drive. Logs are created in FAT16 format on the micro-SD media (not included) and can be downloaded quickly over a USB connection by dragging and dropping the text files from the device. The micro-SD card can also be removed and inserted into a card reader to download the logs. This board connects to a computer with a USB A to mini-B cable (not included).
The board operates at 3.3V but has 5V-tolerant inputs, and it has a recommended supply voltage of 3.6 to 7.5 V (9 V absolute maximum). If you choose to power the board with LiPo batteries, the Logomatic v2 can charge them off of USB with its built-in LiPo charger. The power connector on the board is a 2-pin male JST connector that works with Pololu's 2-pin female JST cables. Note that the power connector is not compatible with the female connectors on Pololu's NiMH battery packs. The board’s pins have a 0.1" pitch and work with 0.1" male headers and 0.1" female headers.
The Logomatic v2 ships with basic serial text and analog logging. This firmware supports many applications, but users are encouraged to modify the firmware for their specific requirements. This firmware is open-source and available under the resources tab. The board uses an NXP LPC2148 ARM7 microcontroller that contains a USB bootloader, so it can be reprogrammed without the need for an external programmer.
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Note: Even though this board has 5V-tolerant inputs, it cannot measure voltages above 3.3 V. These voltages will be logged as 3.3 V.
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