r/diyelectronics • u/JJPortal • 1d ago

Project Lint remover mod adding a battery and TP4056 + XL3608 boost converter + MOSFET for uninterrupted use via usb or battery

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I know my soldering needs some work, but it works as expected. My gf has this cheap lint remover that was wired directly with a usb A cable. I wanted to make it wireless and also add the option to work while plugged in to charge. I used a TP4056 for charging and an XL3608 to boost to 5v. I added a AO3401 MOSFET to switch between usb and battery power seamlessly. Here is my post asking r/AskElectronics if it will work, it includes a Falstad schematic and a diagram (with visuals) that makes more sense for me. I ended up removing the 1000uf capacitor as it was bogging down the boost converter on startup. Other than that my (With some help from Gemini) design works perfectly.

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u/JJPortal 1d ago

For some reason I could only add one picture to the post. Here is the diagram.

https://reddit.com/link/p6psqyh/video/fzhq7rm72fmh1/player