=========
boxetimer
=========

Copyright (C) Davide Gironi @ davide.gironi@tiscali.it

http://www.gurzonet.com/


About
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Boxe timer is a countdown timer based on PIC 16F84A.
Through its 7-segments led display it alternates 2 different countdowns.
In the first mode, called "pause countdown", the display blinks while numbers are shown.
The second mode is named "working countdown" and shows numbers in a traditional way.
When the count reach 0, the devices emits a sound using the internal piezo.

The time is selected using an external switch.

Notes:
-------
a) use the "get the pot scale" functions to get the pot scale of the
   maximum resistor connected to the rotary switch
b) use the "get values for resistors and pot" to get the current timer values
c) use the "get values for piezo freq" to get the best operational frequency for the piezo


License
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/**********************************************************************
*                                                                     *
* This library is free software; you can redistribute it and/or       *
* modify it under the terms of the GNU Lesser General Public          *
* License as published by the Free Software Foundation.               *
*                                                                     *
* This library is distributed in the hope that it will be useful,     *
* but WITHOUT ANY WARRANTY; without even the implied warranty of      *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   *
* Lesser General Public License for more details.                     *
*                                                                     *
* You should have received a copy of the GNU Lesser General Public    *
* License along with this library; if not, write to the               *
* Free Software Foundation, Inc.,                                     *
* 59 Temple Place, Suite 330,                                         *
* Boston, MA                                                          *
* 02111-1307                                                          *
* USA                                                                 *
*                                                                     *
* For further information, visit www.gnu.org                          *
**********************************************************************/