Bluetooth 5w speaker

This is a first test and work in progress for a rechargeable Bluetooth speaker with the ability to be added / hung from a kids bike carrier for bike rides and competing in Parkrun.

Note: all components were glued inside after being wired outside. Might change design for easier access and work-ability as some areas are tight.

Parts used:

- 18650 battery and holder
https://www.aliexpress.com/item/GTF-18650-3-7V-5000mAh-Battery-Rechargeable-Batteries-for-LED-Flashlight/32851953890.html?spm=a2g0s.9042311.0.0.27424c4di8Z4vA

- OEP30w 2 Channel Amp
https://www.aliexpress.com/item/5-pcs-OEP30W-2-Double-Channel-Digital-Amplifier-Board-Module-Diy-Amplifier-Kit-30Wx2-D-Class/32810439202.html?spm=a2g0s.9042311.0.0.27424c4dE4jxaL

- USB Bluetooth audio receiver
https://www.aliexpress.com/item/USB-Bluetooth-Music-Receiver-Adapter-3-5mm-Stereo-Audio-for-iPhone4-4S-5-Mp3-free-shipping/1602812680.html?spm=a2g0s.9042311.0.0.27424c4dtQ9CaQ

- Boost converter (needed for amp as only