# Re: The FIRST thing you need to learn

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 wiresâ€¦
Why doesnâ€™t it work ? !

Iâ€™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 youâ€™re willing to remember algebra, all you need is â€śV = IRâ€ť and â€śP = IVâ€ť

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â€ś`V = I*R`â€ť and â€ś`P = I*V`â€ť -- if you first learn Algebra

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"Twinkle Twinkle Little Star, Power Equals I Squared R."

Tom...

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