Central Security System with pic16f877

| July 14, 2023 Updated
Central Security System with pic16f877

How the Security Circuit Works: The B and D ports of the pic16f877 used in the circuit are selected as inputs. Of these, 8 doors, windows and etc. with port B. Logic 1 or 0 status from places is evaluated. On the D port, the predetermined password required for the system to work or to be stopped is entered.

A and C ports are selected as outputs. Status leds and alarm circuit are driven with A port. A 7-segment LED display is used as an indicator showing where the warning coming from port C and port B is coming from.

The 1st led of the A port is used to determine whether it is 1 or 0 instead of the alarm circuit, the 2nd led enter the password, the warning led is 3. led is password correct led and the system becomes active 4 seconds after this led is lit. The 4th led lights up when we enter the password and stop the system.

Schema pcb and assembly code files Thanks to those who contributed

Circuit diagram

Security System Schematic PCB

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Central Security System with pic16f877 pic assembly source code

Central Security System with pic16f877

Password: 320volt.com

Published: 2008/11/17 Tags: , ,



1 Comment “Central Security System with pic16f877

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