This class isn't going to be useful at all in the context of fish tanks.
Ok. I'll rephrase it. 'I will find this course useful to me.'
Mainly, I just want a better understanding of electronics and circuits.
This course is pitched at a level I can understand and work with. I will really enjoy revising the mathematics. It's nicely timed too, as my kids are just starting to look into the foundation work for calculus...
I understand it is not specifically useful for the type of 'paint by numbers' led+driver+powersource+heatsink DIY build that I've already done.
Nor, indeed, for the arduino controller that I will be doing in the near future. That is all very simple, if a little daunting to do for the first time.
Perhaps though, it will be useful for gaining a little insight into what is going on within the LED drivers, and I will be able to work towards understanding, designing and refining a driver/controller to fit my specific needs.
After all, to steal an analogy, you go to a mechanical engineer to design