Originally Posted by marc1
Just make the precision linked to how long the button is pressed. If you hold the up or down key for more than a few seconds, the current changes in larger steps (0.5A), then you can "click" the up/down buttons to fine tune (0.1A) the current... just like most alarm radios. There's no need to reinvent the wheel!
Yes, this is the way to do it. It leaves the option to fine tune the current. By the way Julez, I often charge at 14.8A!