Hi Joe.
I usually lurk in a different part of the forum, and it was quite by chance that I saw this post, and I'm glad I did!
I first saw the Arnie and Boris articles about six months ago and thought it was a nice practical project that would get me started with Atmel chips.
It seemed straight forward enough, I won't bore you with with the details but let's just say I made little progress programming these glorified 555s, and eventually put it to one side and continued with my Raspberry Pi projects.
Then on Monday I saw your PDF, at last some clarity, *that's* where I have been going wrong, who knew, I was supposed to use Avrdude as well as the IDE?
Anyway, I have just finished the project and this 1980 onyx monstrosity can now dial out via my ATA and Asterisk (Raspberry Pi) PABX.
https://www.vintage-radio.net/forum/...pictureid=3830
https://www.vintage-radio.net/forum/...pictureid=3831
https://www.vintage-radio.net/forum/...pictureid=3829
Thanks Joe!
Graham.
G3ZVT