Continuing the discussion from The FIRST thing you need to learn:
Sadly, I think some of this info is too much for beginners that think.
I have a battery, a stepper motor and all the wires…
Why doesn’t it work ? !
I’ve said before that designing and building wit microcontrollers will use a different set of skills and aptitudes than a set that popular Swedish plastic building block,
Formulas can come, but not yet.
Ohms Law is as complex as it should go for a newbie with no electrical or electronics background, so there is that simple understanding of voltage, current and power.
Even understanding basic resistance is lesson #2
@paulpaulson I split your interesting addition to a dedicated topic due to concerns that it was too much detail in the context of the original beginner-targeted topic.
Carry on.
If you’re willing to remember algebra, all you need is “V = IR” and “P = IV”
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“V = I*R” and “P = I*V” -- if you first learn Algebra
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"Twinkle Twinkle Little Star, Power Equals I Squared R."
Tom... 
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