A PIC16F84A Alarm Clock




Here is a simple PIC16F84A alarm clock. This page summarizes this discussion (in french) in my forum, where Samir (aka numerique1) requested for help to build a weekly alarm clock for his school. Many thanks to him for his tests and patience.

A Alarm Clock

This clock counts seconds, minutes, hours and day of the week.
Time is displayed on 4 seven segment LED displays, and is adjustable with three buttons at start time (up, down, enter).
You can program the day of the week, hour, minute and duration of the alarms.
The number of alarms are limited by ROM space only.
The alarm is on the RA4 open collector output of the PIC, and is repeated on a decimal point of the display.

For once, the program is in BASIC (mikroBasic) and I hope it will make a good start for beginners.

First, the BASIC source code.

Schematic A Alarm Clock

Note that you can build it either for common cathod or common anode LED display.

 

For more detail: A PIC16F84A Alarm Clock




Current Project / Post can also be found using:

  • pic 16f628 Alaram clock circuit with pcb

Leave a Comment

*
= 4 + 3

Read previous post:
Square Function Generator
10MHz DDS Sine/Square Function Generator based on the AD9835 using PIC16F628

An extremely simple and low cost Sine/Square wave generator based on the Analog Devices AD9835 Direct Digital Synthesis (DDS) Generator...

Close
Scroll to top