Bluetooth Speaker

myminifactory

I've always dreamed of owning a portable Bluetooth speaker that can play music anywhere, anytime. So, I decided to design and build one myself. And here it is! This Bluetooth speaker features two rechargeable 18650 batteries, allowing you to enjoy hours of listening fun without plugging it into the wall outlet. The front, back, and body of the speaker need additional support, which I printed using PLA with a 0.2mm layer height and 15% infill. The seal rings, which require two pieces, were printed with NinjaFlex. Update: On December 19, 2017, I noticed that when playing music at high volumes (above the red region on your phone's volume control), the connection would be lost or the device would shut down temporarily. This is likely due to the step-up module struggling to keep up with the power requirements of the amplifier board. I'm confident that this speaker can produce even louder sound, but I need some help figuring out how to overcome this issue. Does anyone have any ideas? To build this Bluetooth speaker, you'll need the following parts: * Brass inserts (24 pieces): Available at https://www.aliexpress.com/item/100Pcs-M3x5mm-L-5mm-OD-Metric-Threaded-Brass-Knurl-Round-Insert-Nuts-LXM/32693221350.html * LED base holder (3 pieces): Available at https://www.aliexpress.com/item/Hot-Sale-10pcs-3MM-Round-Chrome-Metal-LED-Light-Lamp-Emitting-Diode-Bezel-Lamp-Base-Holder/32808747894.html * Bass speaker passive radiator auxiliary bass rubber vibration plate (1 pair): Available at https://www.aliexpress.com/item/1Pair-Black-78x41mm-Bass-Speaker-Passive-Radiator-Auxiliary-Bass-Rubber-Vibration-Plate/32785907739.html * M3x10 screws (24 pieces): Available at https://www.aliexpress.com/item/160PC-Metric-Thread-M3-Stainless-Steel-Screw-Assortment-Bag-Set-with-Torx-Star-Drive/32612692664.html * Bluetooth and charging indicator LEDs (blue, red, green) (3 pieces): Available at https://www.aliexpress.com/item/New-Arrival-300pcs-Five-Colors-3mm-Round-Bright-Light-LED-Diode-Lamp-Assortment-kit-Red-Convenient/32725226668.html * Battery case holder: Available at https://www.aliexpress.com/item/EDT-2-piece-battery-storage-box-case-holder-for-2-x-18650-parallel-lithium-batteries/32716650716.html * LM2587 DC-DC Boost Converter (3-30V to 4-35V step-up module): Available at https://www.aliexpress.com/item/LM2587-DC-DC-Boost-Converter-3-30V-to-4-35V-Step-up-Power-Supply-Module-5A/32612862664.html * Micro USB charger (1 piece): Available at https://www.aliexpress.com/item/20Pcs-lot-5V-1A-Micro-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection-Dual-Functions/32469596060.html * Power socket DC block 2-pin wire with nut (5.5X2.1): Available at https://www.aliexpress.com/item/Quality-Copper-DC-022B-DC-Power-Socket-DC-Block-2-Pin-Wire-With-Nut-5-5X2/32762835561.html * 5V 2A power supply EU plug AC 100V-240V converter adapter: Available at https://www.aliexpress.com/item/5V-2A-Power-Supply-EU-plug-AC-100V-240V-Converter-Adapter/1059369926.html Good luck with your build!