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Password Protected 4 Wire Resistive Touch Screen Controlled Robot with ATmega16
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. 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 4 wire resistive touch screen controlled robot with AVR ATmega16 microcontroller. Here, we will use the 4 wire resistive touch screen as 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 two outputs of touch screen are analog in nature, so these signals cannot be processed directly by the microcontroller. For this, we will use the ADC of the ATmega16 microcontroller to convert the analog signals to digital values. First the user will enter the 4 digit password of which each digit will be displayed in a 16X2 alphanumeric LCD as star(*) and microcontroller will compare the entered password with the set password. The system will ask to enter the password till the correct password is entered by the user. After the correct password is entered, the microcontroller will receive the robot control signal from the touch screen and it will process the control signal to know key of the touch screen is touched. After knowing which key of the touch screen is touched, the ATmega16 microcontroller will send the required control signal to the DC motor driver (L293D) of the robot to drive the robot in the desired direction. Also, the microcontroller will display the direction of movement of the robot in the 16X2 alphanumeric LCD. The control touches 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, touch the touch screen at different position and drive your robot as you want.
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Control Touchs |
Robot Direction |
|
2 |
Forward |
|
4 |
Left |
|
6 |
Right |
|
8 |
Backward |
|
5 |
Stop |
Softwares Required
Hardwares Required
Circuit Diagram
Video
Connection Guide
The step-by-step connection guide for Password Protected 4 Wire Resistive Touch Screen Controlled Robot with ATmega16 is as follows
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Steps - 1 ( 0f 14 )
Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.
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Steps - 2 ( 0f 14 )
Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.
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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.
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Steps - 4 ( 0f 14 )
Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.
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Steps - 5 ( 0f 14 )
Connect PortC header of AVR Trainer Board-100 with Input header of DC Motor Driver with a 10 to 10 FRC Female Connector.
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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.
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Steps - 7 ( 0f 14 )
Connect the Robot connector to the Output header of the DC Motor Driver.
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Steps - 8 ( 0f 14 )
Switch off the Mode Switch of DC Motor Driver.
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Steps - 9 ( 0f 14 )
Connect the Pin1, Pin2, Pin3, Pin4 and VCC pins of 4 Wire Resistive Touch Screen Board with PA0, PA1, PA2, PA3 and VCC pins of PortA header of AVR Trainer Board-100 with 5 to 5 Connector.
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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.
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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.
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Steps - 12 ( 0f 14 )
Switch on the power with the help of Power Switch of AVR Trainer Board-100.
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Steps - 13 ( 0f 14 )
Download Password Protected 4 Wire Resistive Touch Screen Controlled Robot with ATmega16 Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.
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Steps - 14 ( 0f 14 )
Touch the Touch Screen at different position and see the output.
Downloads
Password Protected 4 Wire Resistive Touch Screen Controlled Robot with ATmega16 Project File
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