Schema of digital timer

This page focuses on the realization of a digital timer from 1 minute to 9 hours 59 minutes. It is based on a microcontroller of the PIC family.

This timer rings (if the option is selected), a switch contact when the user programmed time has elapsed.

Diagram of the plate and power management

Slide is a slide switch with 3 double positions. It is available from CONRAD.
It allows you to select three options: disconnecting the buzzer,
complete stop,
buzzer activated.

Diagram of the plate and display control

The display is done through three segments: the hours
tens of minutes,
minute.
The control is done through three push buttons: set / office,
choice of segment,
increment of the segment.

Realization

When programming, it is necessary to configure some bits:
CSOs HS,
To WDT off,
PWRTE to off
CP0 and CP1 to off.