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PROJECT DESCRIPTION

The project is designed to demonstrate how multiple microcontrollers can be connected in a LAN like setup to achieve desired output. This technology is widely used in modern automobiles. More number of microcontrollers are embedded in different kinds of products from industrial environment to domestic area; one very good example is the automobile sector.

Modern day car has a number of microcontrollers integrated within its system. As this number increases, the networking and communication between them becomes necessary. The importance of having multiple microcontrollers against a single one is that if any single microcontroller goes bad, then  only the function related to that particular microcontroller will be affected while the remaining microcontrollers will function normally.

The project demonstrates a command-based monitoring tool using RS232 protocol. A network of three microcontrollers is used in this project. The first one is connected to the keypad for input action while a second one is connected to an LCD display and a third one to a drive a relay for controlling any load (LAMP). The input takes a password on the first MC to display it on the second MC while the third one executes output only if the password is right.

A wrong password if entered would generate a buzzing sound. Though this task can be performed by a single microcontroller, the project uses multiple microcontrollers to explain the concept of networking. It is practically impossible for a single microcontroller to handle the input action and display the output, while they are located way apart. For example, a display unit requiring 15 connections from microcontroller needs to be managed using multi-core cable - similarly, for a keypad using 7 connections and so on.

Thus, for a large number of inputs and displays it would require multi core data cable to be connected to the MC running over kilometers ( for example in an industrial set-up), whereas this project uses a pair of wire only, thereby reducing the complications in wiring and cost as well.

Furthermore, this project being based on a serial communication can be enhanced by using a wireless communication among the controllers by avoiding costly cabling. 

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Multiple Microcontrollers in LAN like Setup
Hardware Requirements
  • 8051 series Microcontrollers
  • Keypad
  • LCD
  • Relay
  • Transformer
  • Diodes
  • LED
  • Resistors
  • Capacitors
  • Regulator
  • Buzzer
  • Lamp
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly
Q & A
Q:  What is the application of CAN system?
A:  CAN(Control Area Network) system is used for multiplenumbers of networked controllers as in Automobile applications.
Q:  Which microcontrollers are used in this project?
A:  Three 40 pin 8051 microcontrollers are used in this project.
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Q:  What to do when the lamp fails and what is the maximum lamp rating that can be used?
A:  If the lamp fails one can use any lamp or bulb which is used in homes up to 100W. We suggest you to go for low watt bulbs.
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