I Lied Another Portable Power System Mod
Had to make just one more upgrade to my DIY Portable Power System, by adding a DC-DC converter so I could charge it directly from another battery (my motorhome battery bank). This led into a tortuous trail of DC-to-DC converter testing that became a minor obsession, but it ended in a success (more or less). And somehow I didn't start any fires in the process.

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Fixing My Mistakes in the Lithium Powered Camper

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Upgrading my DIY Power System - It's working, so why do that???

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I Bought The Cheapest 3D Printer on AliExpress! The Easythreed K10 - Cheap & Fun 3D Printing!

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Inside a 3000W Water-Cooled Power Supply (with GaN & SiC)

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A Small Power Station for a 12V Fridge - A bad idea? Let's have some data.

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The Surprising Flaws in 18650 Lithium-Ion Batteries

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Open Source 8.5 Digit Voltmeter from CERN: Build and Test

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How Does a 12V Fridge Work When It Gets Really Hot? Boy, was I wrong!

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How To Build A Solar Setup: COMPLETE Step-by-Step, DIY Guide (12V, 2000W)

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7 Cheapest and BEST 2000W Inverter Comparison for 2026

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How to Crimp Large Cable Lugs For Offgrid Solar or Marine Electrical

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Lithium Power for an Old Camper: Why, what and how.

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Linear DC Power Supplies - Designing & Building Custom DC Power Supplies

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Building a Gifford-McMahon Cryocooler With 3d-Printed Parts

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High Resolution Scrolling with Stabilised Walnut Dial

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A DIY Portable Power Station for My 12V Fridge (That Actually Works)

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Every Component of a Switch Mode Power Supply Explained

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How to Build an eBike Battery

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I had to upgrade my motorhome power system (before I could even charge my phone)

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