3D Printed Mixtape / DIY Bluetooth Mp3 Player

I recently received a mix cd from a friend, and I decided to send him a cassette tape back. Except it's not a cassette tape, it's an entire MP3 player in a 3d printed case that cost less than $10. 00:00 intro 00:25 parts selection 01:31 layout and case design 01:51 build 02:14 battery circuit problem and fix 03:06 bluetooth problem and chip tangent 04:08 build wrap-up 04:38 budget 05:01 feels about nostalgia 3d files (and wiring diagram) https://makerworld.com/en/models/1699... Parts (affiliate links) 5v usb c charge controller: https://amzn.to/4mMRsdL Everything else is found cheaper on aliexpress bt-201 bluetooth module 523450 battery, 2 pin, 3.7 nominal with 4.2v charge SS-12D10G5 switches (or variety pack: https://amzn.to/4mH5Hk2) Micro Sd card (cheaper on AliExpress, but for reliability, this is my goto: https://amzn.to/4mdrmR5) Icon Attribution https://www.flaticon.com/authors/monkik - Speaker, headphone, and mobile icons created by monkik - Flaticon