a simple boxe timer (code included)

[hozone]

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boxetimer
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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.

Code is attached.
Code is released under the GNU Lesser General Public License.