The amount of work being done (measured in Watts). Meet the Components
Electronic circuits are built from a handful of standard parts, each with a unique job:
To understand how any electronic gadget works, you have to grasp four fundamental "rules of the road": The "push" or pressure behind the current. Current (I): The actual flow of electricity through a path.
One-way streets that allow electricity to flow in only one direction (LEDs are a famous type that light up!).
If you are brand new to the hobby, expert guides like those from Dummies.com and veteran authors like Forrest Mims recommend these steps:
Always work with low-voltage batteries (like AA or 9V) while learning to keep things safe and fun. Electronics For Dummies: Shamieh, Cathleen, McComb, Gordon
The control or "braking" force that slows down the flow.
Tiny switches or amplifiers that are the "brains" of modern computers.