Loud Bluetooth Speaker

Hello everyone,

That is powered by lithium-ion cells

The speaker has a 2x15w amplifier installed

It has a player with Bluetooth, radio module,

card reader and sub port

The system is powered by a 3s 12v battery pack

The battery pack is built from 3x18650 cells

The battery pack is connected to a 3s BMS(battery management system)

The BMS is maybe the most important part of the speaker

The BMS has overcharge and short-circuit protection

First I used a 3d printer to make the battery holders

The box is made of Bambus

I bought it from IKEA

The IKEA name for it is Dragan

Inside the speaker box I installed one extra battery for phone charging

For the build i used 4 speakers

The speakers were recovered from a broken TV

The speakers have 8 ohm

The charging of the pack can be made thru the BMS (battery management system)

I also installed a socket for each of the cells

This way I can use a Smart Charger to balance the pack

The BMS will not balance charge the pack

The BMS will stop charging when any of the cells will reach 4.2 v

This way, one or more cells may not be fully charged

It is recommended to use the Smart Charger because

this way the battery pack will be balanced

A tp4056 module can also be used to individually charge the cells

Why you NEED a cheap 15" 4:3 LCD

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Ferry Bring Peoples From Side To Side On Mekong River Of Cambodia