Bananaflux, THANKS SO MUCH. The Capacitor Trick worked for me. I was also working with a custom Arduino, but I was past the breadboard stage and actually had PCB’s made. I had pulled the Arduino TX, RX, Reset, and GND pins out to a header, with the hope I could solder the AVR chip directly to the board and still be able to make program changes, otherwise I would keep using a socket. I was about to give up when I saw your post. Works like a charm. 100nF capcitor in series – no pullups worked for me. Before that I got the dreaded “avrdude: stk500_recv(): programmer is not responding' error.
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