Arduino 1.8.x Clone With Atmega 8535/32/644p/1284p: the Mightycore

How to use the latest arduino IDE for old and latest atmegas DIP 40. and make a clone of arduino board. This project is the upgrade of the arduino atmega644/1284 clone project. I have got some old atmegas but not obsolete yet and I used them with some software like CodeVision AVR…. and recently I found a way to use these microcontrollers under the latest Arduino IDE, more convinient (I think). So this instructables will deal with : how to use Atmegas 8535/32/644p/1284p under Arduino 1.8.X using the Mightycore project ?”

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