Introduction: AVR- Atmega8 Mini Development Board Hand Made

About: DIY projects

This is a mini project to reduce manufacturing cost and space constraints.

Microcontroller with less memory and less functionality. It costs around Rs.,110/- .

Cost may differ place to place. My motive is to expertise in implementing project if a fresh IC is purchased from market.

A new IC is not programmable, it has to set some fuses inside MCU. So, after setting these fuses we can work further for development n all.

Atmega8 Details

• High-performance, Low-power Atmel® AVR® 8-bit Microcontroller • Advanced RISC Architecture – 130 Powerful Instructions – Most Single-clock Cycle Execution – 32 × 8 General Purpose Working Registers – Fully Static Operation – Up to 16MIPS Throughput at 16MHz – On-chip 2-cycle Multiplier • High Endurance Non-volatile Memory segments – 8Kbytes of In-System Self-programmable Flash program memory – 512Bytes EEPROM – 1Kbyte Internal SRAM – Write/Erase Cycles: 10,000 Flash/100,000 EEPROM – Data retention: 20 years at 85°C/100 years at 25°C(1) – Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation – Programming Lock for Software Security • Peripheral Features – Two 8-bit Timer/Counters with Separate Prescaler, one Compare Mode – One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode – Real Time Counter with Separate Oscillator – Three PWM Channels – 8-channel ADC in TQFP and QFN/MLF package Eight Channels 10-bit Accuracy – 6-channel ADC in PDIP package Six Channels 10-bit Accuracy – Byte-oriented Two-wire Serial Interface – Programmable Serial USART – Master/Slave SPI Serial Interface – Programmable Watchdog Timer with Separate On-chip Oscillator – On-chip Analog Comparator • Special Microcontroller Features – Power-on Reset and Programmable Brown-out Detection – Internal Calibrated RC Oscillator – External and Internal Interrupt Sources – Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and Standby • I/O and Packages – 23 Programmable I/O Lines – 28-lead PDIP, 32-lead TQFP, and 32-pad QFN/MLF • Operating Voltages – 2.7V - 5.5V (ATmega8L) – 4.5V - 5.5V (ATmega8) • Speed Grades – 0 - 8MHz (ATmega8L) – 0 - 16MHz (ATmega8) • Power Consumption at 4Mhz, 3V, 25C – Active: 3.6mA – Idle Mode: 1.0mA – Power-down Mode: 0.5µA

Step 1: Component S Required for Making the Board

Most basic components are:

Most basic things are:----

1) vero board

2) soldering material/wire

3) soldering iron

4) DC socket

5) ic 7805 for 12v to 5v drop

6) 28 pin ic socket

7) Ceramic capacitor (non-polar) .1mf

8) 10mf/16v capacitor

9) 10 pin socket

10) led red or green

11) Single line pins for PORT

12) 330 Ohms resistance

Step 2: Circuit Diagram

I have used internal clock(8MHz)

For other connections plz. refer diagram given above....