PuProject B4 - BBBB - Better Bluetooth Boom Box

If there is people building better Mousetraps, why not build a better Bluetooth Boom Box ...

My approach to this is:

1. take a not-too-crappy bluetooth stereo loudspeaker box (Pearl ZX-1698):

   

2. build a chinese bluetooth/SD/USB AV player module into it (AliExpress Artikel 4000816619067):

   

This includes:

1. Power Supply:
   1. adding an own LiPo 3.7V battery with:
   2. USB LiPo charging module:
   3. 3.7V to 5V boost DC converter
2. Amplifier adding an 2 x 3W stereo amplifier

Power Supply

Variant 1

• Charger: DayPower M-LL-TP4056 LiPo Lademodul
• Boost Converter:(zu ergänzen)

• Results: Boost Converter provides too low voltage for #Player, Bluetooth cuts out.

Variant 2

• USB-Power-Bank Module
• Results: Boost Converter provides too low voltage for #Player, Bluetooth cuts out.

Variant 3

• [ zu verarbeiten ] - AITEXM 3.7V LiIon Charger/StepUpConverter
• (zu ergänzen)