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Turn Your Arduino Into an ISP

Turn Your Arduino Into an ISP
There are a few instances in which it is neccesary to program microcontrollers without a bootloader. For example, if have run out of storage on a chip you can get an additional 2KB when you program without a bootloader. Another example, the one I will show you how to do, is to program chips that have no serial capabilities and therefore cannot use a bootloader. The ATtiny85 is one of these chips. To program the ATtiny85 using the Arduino ISP you must first add ATtiny85 support to the Arduino environment: * Download attiny45_85.zip * Unzip the folder * Copy the folder to the Arduino IDE's Hardware folder * Reopen the Arduino IDE, you should see the ATtiny85 in the Tools >> Board menu Now connect your Arduino ISP to the ATtiny85 like the diagram below. Open the Blink sketch, change every '13' to '0', select ATtiny85 from the Tools >> Board menu, and select the serial port that is your Arduino ISP.

http://www.instructables.com/id/Turn-Your-Arduino-Into-an-ISP/

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