I've read the news and saved that schematics with Atmega164PA chip. It is not a huge problem for me to put together that circuit, but I however have one question at that point. There are a few different versions of that Atmega164PA chips on the market (classic PIC - simple to solder, SMD, BGA, etc...), all of those should probably work the same?
Secondly, how do I flash that chip? Do I have to flash it in separate programmer before I solder it into the circuit, or should I just put together that circuit and then connect it via USB cable to PC (same as TEENSY or AT90USBKEY) and flash it using some special software?
I found that circuit on many pages but there's no real description how-to "flash" the .hex binary PSGroove to that Atmega164PA chip, so any kind of help would be highly appreciated...
Thank you in advance for your answer, Tomaz.