ATMEGA328AU bootloader and programming sketches

I needed to update how to boot-load and program ATMEGA328AU chips.

Attached is a brief rundown on how-to.

I hope you find it useful.

PDF

First double sided board

Developing.



Etching setup.



Rivets for vias. 0.6 x 0.8mm.



Resistor and LED, 0605.



uC left to solder then clean off flux and test.



A couple of issues with developing process. Going to try some heat.