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Password Protected Keypad Controlled Robot with ATmega16

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Security is a prime concern in our day-to-day life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system. These techniques are an integration of mechanical and electronic devices and highly intelligent. One of the prominent features of these innovative lock systems is their simplicity and high efficiency. Such an automatic lock system consists of electronic control assembly which controls the output load through a password. This output load can be a motor or a lamp or any other mechanical/electrical load.

In this project, we will learn How to design a password protected keypad controlled robot with AVR ATmega16 microcontroller. Here, we will use the 4X4 keypad is the input device to enter the password and to drive the robot in different direction. The password is a 4 digit number. In our case the password is “1234” which can be changed in the program. To gain access of the robot control, the user has to enter the correct password. The ATmega16 microcontroller will read the 4X4 keypad. First the user will enter the 4 digit password each digit of which will be displayed in a 16X2 alphanumeric LCD as star(*). The microcontroller will compare the entered password with the set password. The system will ask to enter password till the correct password is entered by the user. After the correct password is entered, the microcontroller will read the robot control signal from 4X4 keypad and it will process the control signal to know which key of the 4X4 keypad is pressed. After knowing which key of the 4X4 keypad is pressed, the ATmega16 microcontroller will send the required signal to the DC motor driver (L293D) of the robot to drive the robot in the desired direction and it will display the direction of movement of the robot in the 16X2 alphanumeric LCD also. The control keys for the robot are 2, 8, 4, 6 and 5 to drive the robot in forward, backward, left, right direction and to stop it respectively. Now, press different keys of the 4X4 keypad and drive your robot as you want.

Control Keys

Robot Direction

2

Forward

4

Left

6

Right

8

Backward

5

Stop

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega16 1pc
AVR USB Programmer 1pc
12V, 1A DC SMPS Adaptor 1pc
DC Motor Driver 1pc
Robot V 4.1 1pc
4X4 Keypad 1pc
1 to 1 Connector-Female to Female 4pc
10 to 10 FRC Female to Female Connector 4pc
RG1602A 16X2 Alphanumeric LCD Green 1pc

Circuit Diagram

Video

Connection Guide

The step-by-step connection guide for Password Protected Keypad Controlled Robot with ATmega16 is as follows

  • Steps - 1 ( 0f 14 )

    Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.

  • Steps - 2 ( 0f 14 )

    Connect PortA header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

  • Steps - 3 ( 0f 14 )

    Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.

  • Steps - 4 ( 0f 14 )

    Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

  • Steps - 5 ( 0f 14 )

    Connect PortB header of AVR Trainer Board-100 with Input header of DC Motor Driver with a 10 to 10 FRC Female Connector.

  • Steps - 6 ( 0f 14 )

    Connect the 12V pin of PWM & Motor Voltage header of DC Motor Driver with the 12V header of AVR Trainer Board-100 with a 1 to 1 Connector.

  • Steps - 7 ( 0f 14 )

    Connect the Robot connector to the Output header of the DC Motor Driver.

  • Steps - 8 ( 0f 14 )

    Switch off the Mode Switch of DC Motor Driver.

  • Steps - 9 ( 0f 14 )

    Connect PortC header of AVR Trainer Board-100 with Keypad header of 4X4 Keypad with a 10 to 10 FRC Female Connector.

  • Steps - 10 ( 0f 14 )

    Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.

  • Steps - 11 ( 0f 14 )

    Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

  • Steps - 12 ( 0f 14 )

    Switch on the power with the help of Power Switch of AVR Trainer Board-100.

  • Steps - 13 ( 0f 14 )

    Download Password Protected Keypad Controlled Robot with ATmega16 Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

  • Steps - 14 ( 0f 14 )

    Press different keys of the 4X4 keypad and see the output.

  • Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.

    Steps - 1 ( 0f 14 )

  • Connect PortA header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

    Steps - 2 ( 0f 14 )

  • Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.

    Steps - 3 ( 0f 14 )

  • Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

    Steps - 4 ( 0f 14 )

  • Connect PortB header of AVR Trainer Board-100 with Input header of DC Motor Driver with a 10 to 10 FRC Female Connector.

    Steps - 5 ( 0f 14 )

  • Connect the 12V pin of PWM & Motor Voltage header of DC Motor Driver with the 12V header of AVR Trainer Board-100 with a 1 to 1 Connector.

    Steps - 6 ( 0f 14 )

  • Connect the Robot connector to the Output header of the DC Motor Driver.

    Steps - 7 ( 0f 14 )

  • Switch off the Mode Switch of DC Motor Driver.

    Steps - 8 ( 0f 14 )

  • Connect PortC header of AVR Trainer Board-100 with Keypad header of 4X4 Keypad with a 10 to 10 FRC Female Connector.

    Steps - 9 ( 0f 14 )

  • Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.

    Steps - 10 ( 0f 14 )

  • Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

    Steps - 11 ( 0f 14 )

  • Switch on the power with the help of Power Switch of AVR Trainer Board-100.

    Steps - 12 ( 0f 14 )

  • Download Password Protected Keypad Controlled Robot with ATmega16 Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

    Steps - 13 ( 0f 14 )

  • Press different keys of the 4X4 keypad and see the output.

    Steps - 14 ( 0f 14 )

Downloads

Password Protected Keypad Controlled Robot with ATmega16 Project File
  • 5 downloads 0 Kb

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