I have a transistor tester with 16x2 LCD running a plug-in at328 with an 8Mhz xtal. I would like to use this hardware for another purpose.
My first idea was to replace the crystal with a 16Mhz one, write a program on my Uno and swap the AT328.
Is this the only way? I also have an USB adapter. Reading/saving the code now on it is of secondary interest.