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PoweršŸ”—

Every circuit on this site needs a steady voltage from somewhere. This topic covers both ends of that: the chemistry that stores energy in a battery, and the regulators and supplies that turn a sagging battery or a wall outlet into the exact voltage a circuit wants.

The articles assume Circuit Foundations, especially Ohm's Law and Power; the regulators article also leans on Diodes and LEDs and Transistors.

Power reading order, as a transit map One line through two stops. Storing it: Cells and Batteries; Steadying it: Voltage Regulators. Every stop is a link to its article. Click any stop to open its article Storing it Steadying it 1. Cells and Batteries 1 Cells and Batteries 2. Voltage Regulators 2 Voltage Regulators
The reading order as one line. Every stop is a link.

1. Storing ItšŸ”—

  • Cells and Batteries ā€” how a cell pumps charge, why internal resistance steals voltage, eight chemistries compared, and how to charge and store them safely

2. Steadying ItšŸ”—

  • Voltage Regulators ā€” linear regulators and their heat, dropout, switching regulators, and the four stages of a mains power supply

Where to StartšŸ”—

Start with Cells and Batteries: every project here runs on one, and its sagging voltage is the reason regulators exist.