I’ve standardized on using a 5V FTDI board for all custom designs to keep it simple and avoid mistakes. When I need to reprogram a controller, the same FTDI board will work for any of my boards irrespective of being a 3V3 or 5V design.
Awesome, Ben, thanks for all the great info. Looks like I will do the same.
On 3V3 designs it will be connected to the onboard regulator input
Ok, cool, this is what I did, and it's working great. This seemed like the right way, but I'm still finding my way on the electronics part of things.
you don't want to connect two independent supplies to the same rail)
Good to know, I was not aware of this.
So how is this working on a stock Uno? Let's say you have it plugged into the wall, so the 5V output of the regulator is on the same line as the 5V coming from the USB cable, right?