24 V Power Supply

Intro

• From 120AC to 24V DC using arduino, and 6A max output.
• 10A fuse on DC side
• Arduino topology - Rectify AC, chop it, filter it, that's it.

Logic

• Separate the logic from power, and do not use integrated circuits
• Arduino - a standard component - provides the logic
• Transistor - provides the power handling.
• Example of this - [1]

Terminology

• Transformerless power supply typically refers to a power supply where a capacitor and resistor are dropping the voltage to a required level. This is valid for 1 amp or less current.
• Switch mode power supply is one that uses fast, active switching

Working DOC

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BOM

• 10a rectifier - [2]

Industry Standards

Commercial

• Arduino-based 30A power supply running from 120 AC - [3]

Links

• Shocking truth about transformerless power supplies on Hackaday - [4]. Good explanations, but this is not about switch mode power supplies
• Power Supply Basics