AVR Target Board





Introduction: AVR Target Board

This for programming AVR chips and specifically the one's i am using are the ATtiny85,  ATtiny2313 and ATMega328P.
This not my original design. At this time i can not locate where i got the files from. When i find them i will include them.    

Step 1: Art Work

I print my art work for the PCB onto acetate, clear plastic paper with a laser printer.
I use photo resist exclusively, Even the best heat transfer process cannot come close to matching the photo resist process.

Step 2: Board

This will work if a external clock is not used. Well you could program in external clock fuses but you can't program out external clock fuses out with out the clock. For that you would need to build a different target board or just use a bread board.

Step 3: AVR Target Files

I used these files without the crystal.

Step 4: Target Files W/ Crystal

If you use these files be careful. They are not finished. The 22pF caps still placed in. 



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Hi WWC, im planning on building my own avr development board for 28 pin chips and 8 pin chips. My question is if you can use an external crystal with an 8 pin ATTINY?

Hope to get a responds!

This is the schematic im planning to use: http://www.element14.com/community/message/94929/l/avr-development-board-schematic#94929
The 100nF capicitor near the crystal has to be 22pF ofcourse!


Well yes but why do you want to do that, what kind of projects are you doing that you need an external crystal?
Looks to me you are getting ahead of your self. If you do not know these answers i would say you should stick to some easier projects until your skill level and experience has improved. I wish you all the best and good luck.

I want to keep all options open! I will start ofcourse easy using the internal crystal.

Nice work and well presented ible.



Thank You