I have some new from DigiKey ATMEGA328PU in the DIP28 package.
I am burning them for 8mhz internal clock. Using MiniCore.
They seem to take the bootloader OK (shows successful), but when I go to put my program in, I get the "not in sync" error.
avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x57
Yes, I pulled the micro out of the Uno before programming my new 328. Also tried an FTDI cable, no joy.
I know it has to be simple, thoughts?