L293D Driver Interfacing with AVR ATmega16 Microcontroller

L293D based DC Motor Driver Interfacing with ATmega16 in 5V Mode

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DC Motor Driver is a L293D based motor driver interface board from ABLab Solutions. The main aim of interfacing DC motor with any microcontroller is to control the direction and speed of a DC motor. But due to high voltage and current requirement of DC motors, it cannot be interfaced directly with microcontrollers. For to interface DC motor with any microcontroller, you need a motor driver. Motor driver is basically a current amplifier which takes a low-current signal from the microcontroller and gives out a proportionally higher current signal which can control and drive a motor. L293D is a dual H-Bridge motor driver IC. With one L293D IC we can interface two DC motors which can be controlled in both clockwise and counter clockwise direction.

In this project, we will learn How to interface a L293D based DC Motor Driver in 5V mode with AVR ATmega16 microcontroller. The 5V mode is used to run a DC motor at constant speed in clockwise and anti-clockwise direction. In 5V mode, 5V is given to two enable pins of L293D. Here, we will use the DC Motor Driver to control the direction of two DC motor mounted on a Robot at constant speed. The ATmega16 microcontroller will provide the necessary signal to the DC Motor Driver to run the robot in forward, left, right, reverse direction and to stop it respectively each for 2 minutes. The below table shows the different directions of DC motor with different signals to DC Motor Driver.

Input 1	Input 2	Direction of DC Motor
0	0	Stop
0	1	Anti-Clockwise
1	0	Clockwise
1	1	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
1 to 1 Connector-Female to Female	1pc
10 to 10 FRC Female to Female Connector	2pc

Circuit Diagram

Video

Connection Guide

The step-by-step connection guide for L293D based DC Motor Driver Interfacing with ATmega16 in 5V Mode is as follows

Steps - 1 ( 0f 9 )

Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.
Steps - 2 ( 0f 9 )

Connect PortB header of AVR Trainer Board-100 with Input header of DC Motor Driver with a 10 to 10 FRC Female Connector.
Steps - 3 ( 0f 9 )

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 - 4 ( 0f 9 )

Connect the Robot connector to the Output header of the DC Motor Driver.
Steps - 5 ( 0f 9 )

Switch off the Mode Switch of DC Motor Driver.
Steps - 6 ( 0f 9 )

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 - 7 ( 0f 9 )

Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-FM Cable.
Steps - 8 ( 0f 9 )

Switch on the power with the help of Power Switch of AVR Trainer Board-100.
Steps - 9 ( 0f 9 )

Download the L293D based DC Motor Driver Interfacing with ATmega16 in 5V Mode Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

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

Steps - 1 ( 0f 9 )
Connect PortB header of AVR Trainer Board-100 with Input header of DC Motor Driver with a 10 to 10 FRC Female Connector.

Steps - 2 ( 0f 9 )
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 - 3 ( 0f 9 )
Connect the Robot connector to the Output header of the DC Motor Driver.

Steps - 4 ( 0f 9 )
Switch off the Mode Switch of DC Motor Driver.

Steps - 5 ( 0f 9 )
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 - 6 ( 0f 9 )
Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-FM Cable.

Steps - 7 ( 0f 9 )
Switch on the power with the help of Power Switch of AVR Trainer Board-100.

Steps - 8 ( 0f 9 )
Download the L293D based DC Motor Driver Interfacing with ATmega16 in 5V Mode Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

Steps - 9 ( 0f 9 )