Li-Ion BT stereo speaker box with charging modules

thingiverse

Human: Parts list - XY-BT-Mini 3.7-5V Bluetooth 4.1 Stereo Line-out module (made for 1s Li-Ion power but has no proper protection circuitry so can run on a single cell but could discharge the cell to breaking point) - TP4056 charger & protection circuit module - 3x Li-ion 18650 1800mAh (or more but the TP4056 only delivers 1A max so more cells or capacity will take longer to charge) connected in parallel (1s) - 2x 8cm 4Ohm 3watt speakers (just what I had lying around) - mini on/off rocker switch (14x20mm) - line-out-to-cinch cable (optional - it is preferable of course to solder the speaker wires to the BT module) - dual port cinch adapter (optional) - QC3.0 usb charger module (charging your mobile while it plays music doesn't appear to be possible though as the charging module draws too much power for the bluetooth module to compensate) - speaker covers The front panel has been reinforced to accommodate the speakers, which can be screwed in or glued on using hot-glue. I've also chamfered the speaker openings for aesthetic appeal. The left side panel features an opening for the switch and an opening for the TP4056 micro usb charging port. The right side panel boasts an opening for a USB QC3.0 charger module. Optionals still in development: - LED's to indicate charging status and Bluetooth connectivity (will wire these to existing LED's on modules and add them in the middle of the front panel) - Voltmeter to display battery power (will add these to the side panel next to the QC charging port) - base port to compensate for small speaker size Surprisingly, sound quality is impressive without even sealing the case or adding inside padding or the base port!