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hey arnolde (or anyone?)
I'm thinking a little far ahead, but how do you plan to isolate the power section from the control section while still measuring battery voltage?
I've been going back and forth about using an optoisolator between control board and mosfet driver input and finally went through the mental exercise of adding it in. Now, the switching section is isolated, but I still need to measure battery voltage.
I had planned on using a resistor divider to bring the voltage down and then route it to an analog input on the micro (likely with an opamp to amplify the range to get higher resolution). In order to do this, I'd need to have a common ground between the battery (-) and the control board is tied to the output loop and is no longer isolated.
Maybe that's ok? Thinking about it now, I think optoisolators are still necessary since the power section ground ( neg from the rectifier) is at a different voltage than Batt(-) due to the voltage across the inductor.
i'll just have to try it! Unless there's an isolated way to measure voltage?
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