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microcontroller - Isolating digital I/O on an Atmega328 - Electrical Engineering Stack Exchange
Useful Arduino & ATMega microcontrollers pinout diagrams | Arduino Blog | Arduino, Arduino books, Arduino projects
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10pin To 6 Pin Adapter Board+ Usbasp Usbisp Avr Programmer Usb Atmega8 Atmega128 Attiny/can/pwm 10pin Wire Module Diy - Integrated Circuits - AliExpress
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Kanda - Guide to AVR ISP Circuit Schematics
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How to Use Arduino Analog Functions in Your Design | DigiKey
