Thursday, October 12, 2017

Microcontroller Projects: RFID based Attendance System Circuit using 8051

Robometricschool. - This is one of the microcontroller project circuit to build RFID based attendance system using 8051. This circuit very suitable when you want to control some unit using RFID.

In here we will give you the RFID based attendance system circuit schematic, component parts, and also the description of this circuit and the last we will allow you to read more this project from original source.

Circuit Schematic

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Component Parts

  • AT89C51 Microcontroller
  • AT89C51 Programming Board
  • 11.0592 MHz Quartz Crystal
  • 2 x 33pF Ceramic Capacitors
  • 2 x 10KΩ Resistor
  • 10µF Electrolytic Capacitor
  • 2 x Push Button
  • 16 x 2 LCD Display
  • 3 x 1KΩ Resistor
  • 10KΩ POT
  • EM-18 RFID Reader Module
  • RFID Tags or Cards
  • Connecting Wires


This is microcontroller project RFID based attendance system using 8051 for you in this time. Accordingly Electronichub site describe that the main components of the project are 8051 based microcontroller, 16×2 LCD, and RFID reader module.
First we’ll see the basic connections with respect to the microcontroller. Here, we’ll need to connect a crystal, a reset circuit and external access.

To use the on-chip oscillator, an 11.0592 MHz quartz crystal is connected to pins 18 (XTAL2) and 19 (XTAL1) of the microcontroller. Two 33pF ceramic capacitors are connected from the crystal to ground.

The reset on the 8051 microcontroller is active high i.e. upon applying a high pulse to RST pin, the microcontroller will reset. A 10KΩ resistor is connected from the RST (Pin 9) of the microcontroller to ground.

A 10µF electrolytic capacitor is connected between the positive supply and RST pin. A push button is connected across the capacitor.

The External Access pin (Pin 31) is connected to positive supply using a 10KΩ resistor. This completes the basic connections with respect to microcontroller. For more information about this microcontroller project RFID based attendance system using 8051 you can read more HERE.


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