Sorry if in the wrong forum but still in the planning stage in my head so guessed it would go here.
I would like to build a digitally controlled buck converter as it will help me to understand a few things I've not used yet. And wondered if someone could throw their 2 cents in on my idea.
If I'm correct in my understanding, buck converters work with a voltage divider on the feedback pin, can I replace the voltage divider with a digital pot controlled with an Arduino??
I've read a couple of times that you shouldn't set the voltage on a buck without a load connected. First of all, I must have dodged a few bullets cos I've always done it that way. Second, I've never used a rotary encoder, can you use them in a way that 'home' is wherever you want it to be. So say I'm using the buck on something, had set the voltage, now want to change the voltage for a new device. If I was using an analog pot to control the voltage I'd have to reset back to home after turning it off, but I want to be lazy and not have to do that. When I switch the buck on once the second device is connected, can I take that old position as the new 0 and go from there.
Many thanks
Iain