Programmable Cyclic Set On-Off Timer With Relay Output

This project is to build cyclic on-off programmable timer. In this project user can set ON timer and Off time using keys and 7 segment display. Relay is provided as output, where relay will be remained ON for ON time and it will goes OFF after ON time overs. And Relay will remain Off till Off time overs.

We Requires 4 keys for operation like Change digit, shift digit and start and stop timer.

Components required are as follows for the project as Follows

1 x PIC16F876A
1 x PIC Dev Board

4 x Keys

4 x 7 Segment Common Cathod or Common Anode

+5v Power Supply

4 x BC547 Transistor

I have used Common cathode 7 segment along with NPN transistor.

Set the set timer using keys and display.
Use menu key to enter into options and set the ON time and Off time.

After that Start the timer, Timer will be running continue.

Here is small video of the operation of the project:

Here is schematic of complete project:

please find executable in following path

https://github.com/embhobbb/electronicsDIY