180 rotating Bluetooth speaker
thingiverse
I built this speaker to enjoy great music while swimming. The power comes from a budget-friendly Bluetooth amplifier board from Sanwu, which is mine in blue without an auxiliary input: http://www.banggood.com/TDA7492P-Bluetooth-CSR4_0-Audio-Receiver-Digital-Amplifier-Board-p-1067571.html. This board is affordable but produces sound that's incredibly impressive, and it will be tough to find something better at this price. I'm also using a full-range speaker with a 3.5-inch diameter and three 18650 batteries with a protection board: http://www.banggood.com/10A-Charger-Protection-Board-For-18650-Li-ion-lithium-Battery-Cell-p-1065140.html. In my tests, the system ran for more than eight hours without needing to be recharged. To assemble the rotational mechanism, you'll need an M8x35 screw, three M8 washers, and one M8 self-locking nut on each side. I recommend printing with 100% infill to reduce vibration. Approximately 260 grams of filament are needed to print the entire box. Print Settings: * Printer Brand: RepRap * Printer: Kossel mini * Rafts: No * Supports: No * Resolution: 0.2 * Infill: 100%
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