Target butler is an archery-related project that tries to 'read' the arrow score based on sound and vibration sensor readouts.
  4 sensors (microphones) are surrounding the target itself, each of the 4 channels are amplified and the resulting signal passes thru an envelope-detection circuit. the 4 ADC values are read at a ~1ms interval by the uC.
  power is either from a 2Ah LiPo accu, any random 5V source or a solar panel.

  this project has not reached a 'working' stage. the sensors need to be changed to something that has a more omni-directional quality.

  Library dependencies for the included avr software:

  rfm12b      http://jeelabs.org/2009/02/10/rfm12b-library-for-arduino/
  sdfatlib    http://code.google.com/p/sdfatlib/

  dependencies for the server-side software:

  // not written yet

  Author:          Petre Rodan <2b4eda@subdimension.ro>
  Available from:  https://github.com/rodan/target_butler
  License:         GNU GPLv3