Hardware….AVR, L293D, Voltage Regulator , AVR Development Board …

INTRODUCTION• ATmega16 is a microcontroller based on the AVR RISC

architecture• By executing powerful instructions in a single clock cycle, the

ATmega16 achieves throughput approaching 1 MIPS per MHz• In order to maximize performance and parallelism, the AVR

uses a Harvard architecture- which separates memories and buses for program and data

PIN CONFIG

PIN DESCRIPTION• VCC Digital supply voltage• GND Ground• RESET A low level on this pin for longer than the minimum

pulse length will generate a reset, even if the clock is not running

• AREF The analog reference pin for the A/D Converter• AVCC The supply voltage pin for the A/D Converter

I/O PORTS

FOUR 8 bit I/O ports of ATmega16 are• PORT A• PORT B • PORT C• PORT D

L293D – Motor Driver IC

L293D PCB

L293D ICVOLTAGE

REGULATOR

PUSH-PULL four Channel Driver with Diodes

Designed to accept standard DTL or TTL logic levels and drive inductive loads and switching power

transistors

Suitable for use in switching applications at frequencies up to 5KHz

It is assembled in a 16 lead plastic package which has 4 centre pins connected together and used for heat

sinking.

L293D MOTOR DRIVER

Voltage Regulator 7805

Features

• Output current in excess of 1A• Internal thermal overload protection• No external components required• Internal short circuit limit.• Available in the TO-03 package

Voltage Range

Different versions of LM78XX• LM7805 5V• LM7812 12V• LM7815 15V• Need: Microcontroller needs a constant 5V supply which

can be obtained using LM7805.

AVR Development Board

7805 Voltage RegulatorMAX232

Power supply

ATmega16Reset switch

ISP Connector

Any Doubts..??

• AVR• L293D• Voltage Regulator• AVR Development Board