Home security app using PIC micro controllers

• Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. 

• An access control for doors forms a vital link in a security chain.

• The Micro controller based Home Security System can be adopted at Home it has various type of Sensors.

•  For making an easy and effective home security system we can use magnetic sensors, Wire Loop sensors, Fire sensors. 

•  The system is fully controlled by the  PIC µ 8951.

The Flowchart:

Designed Circuit:

Working:

Applications

The PIC micro controllers have a very wide range of applications. Some of them are-

Temperature Sensor

Keypad

Heart beat sensor

Calculator

LED desk lamp

POV display

Binary clock

Home Appliances

Frequency counter

Ultrasonic range finder

Parallel port interface

Servo motor driver

Light sensor

The plot of the blog

The main focus of this blog is on the applications of PIC micro controllers. So here is a brief description of the features of PIC16F877:-

RISC architecture
• Only 35 instructions to learn
• All single-cycle instructions except branches

Operating frequency 0-20 MHz

Precision internal oscillator

• Factory calibrated

• Software selectable frequency range of 8MHz to 31KHz

Power supply voltage 2.0-5.5V

• Consumption: 220uA (2.0V, 4MHz), 11uA (2.0 V, 32 KHz) 50nA (stand-by mode)

Power-Saving Sleep Mode

Brown-out Reset (BOR) with software control option

35 input/output pins

• High current source/sink for direct LED drive

• software and individually programmable pull-up resistor

• Interrupt-on-Change pin

8K ROM memory in FLASH technology

• Chip can be reprogrammed up to 100.000 times

In-Circuit Serial Programming Option

• Chip can be programmed even embedded in the target device

256 bytes EEPROM memory

• Data can be written more than 1.000.000 times

368 bytes RAM memory

A/D converter:

• 14-channels

• 10-bit resolution

3 independent timers/counters

Watch-dog timer

Analogue comparator module with

• Two analogue comparators

• Fixed voltage reference (0.6V)

• Programmable on-chip voltage reference

PWM output steering control

Enhanced USART module

• Supports RS-485, RS-232 and LIN2.0

• Auto-Baud Detect

Master Synchronous Serial Port (MSSP)

• supports SPI and I2C mode

Categorization of PIC Micro controllers

What makes a Micro controller Useful?

• Small Instruction Set to learn
• RISC architecture
• Built in oscillator with selectable speeds
• Inexpensive
• Programmable Comparators
• Easy in-circuit programming

Difference b/w µProcessor & µController