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+Wanted a inexpensive GSM/GPS backup tracker for our [[HABEX2]] project.
+There are a couple out on the market.  Things for tracking your pets and such.
+But instead of buying one, we wanted to make one that's easily hackable and could be configured specifically for the HABEX mission.
+At the core of the tracker is simcom's SIM908 module.
+{{:sim908.jpg?200}}
+The module works on the GSM 850MHz, EGSM 900MHz, DCS 1800MHz and PCS 1900MHz frequencies.
+It can also do multi-slot class 10 GPRS. (85kbps down/ 42kbps down max)
+It contains an GPS receiver and a real time clock.
+The NSL tracker board will use an ATMEGA2560 MCU and an FTD232RL for USART to USB.
+{{:tracker.jpg?400}}
+The board also has a mic and an accelerometer for motion detection.
+All powered by a [[http://www.batteryspace.com/Customize-Polymer-Li-Ion-battery-Module-UL-listed-3.7-V-2000mAh.aspx|Li-Po battery]] that will be recharged directly from the board.