UPC EETAC Bachelor's Degree in Telecommunications Systems and in Network Engineering EEL

Chapter 3 problems

      - D3.5 -

MM:SS programmable timer




1. Specifications

The idea is to invent a timer circuit (Timer_MMSS) that can count down up to one hour real-time, as in P8 but using the µC chip PIC18F4520.

Front panel

Fig. 1. Front panel with main details of the Timer_MMSS application.

Fig. 2 shows the hardware circuit in Proteus.

Hardware circuit

Fig. 2. Hardware circuit in Proteus.

These materials can help you in this design: Timer HHMM complete project solved using a µC ATmega8535. Adapt it to your target chip PIC18F4520.