Believe it or not, Arduinos use electricity to perform the magic.
Based on a LOT of threads here, Many makers have no idea of OHMS LAW - the fundamental knowledge to create anything vaguely reliable in electronics.
and Kirchhoff's circuit laws are also important.
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Before you learn ohm’s law to relate them, you need to understand that current and voltage are different things.
Not:
”My battery is 9V, so I have plenty of current.”
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2 posts were split to a new topic: Re: The FIRST thing you need to learn
- And use electricity to make the magic smoke.
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The FIRST thing you need to learn
is to provide all relevant details in the first post, instead of letting people extract them with pliers one by one in the next 50 posts 
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FIRST to learn is the How To Post thread!
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