Switchers

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Switchers

Swatches

These things are everywhere. Sometimes called (the unfortunate name of) wall warts, but better called a DC Power Brick, or AC/DC adapter.

Calculators

Some manufacturers will have calculators in addition to the app notes that you can use. These are often based on excel/spreadsheet software. Reference: https://www.eevblog.com/forum/projects/buck-loop-stability-tuning/msg5453216/?topicseen#msg5453216 As with any spreadsheet per B. Pease (For reference, see his columns https://archive.org/details/Bob_Pease_Lab_Notes), you can only trust it if, and only if, it doesn't have any mistakes in the formulas it's built with...

Tips/Techniques

Stock 5V and 12V

These are the most common voltages. Always try to standardize on the most common barrel plug (which is I think 2.1 or 2.5mm, and 5mm or thereabouts).

Diodes Gone Wild

He has a number of videos that diagnose broken switching power supplies and is reasonably knowledgeable about them.

Example of 5V 8-pin DIP Regulator

https://www.eevblog.com/forum/repair/need-help-to-identify-a-blown-chip-in-skynet-for-z12c-switching-power-supply/msg5445107/ It's always easy to spot the capacitor and diode.