DIY mini Bluetooth speaker

This tutorial is about a simple, cheap small Bluetooth speaker. I am a loyal fan of miniature function. I bought these two modules with a price of approximately $ 100 (about 1.3 US dollars), and all other things used in the project were free, and remember that the aesthetics was very important in miniature projects, so it is us. The primary task. Replenishment Breeze Small speaker (I recovered from the old smartphone) A USB cable A small metal Some cloth A LED and resistance (100 ohms) Epoxy resin Woodworking tool (for punching and cutting wood, file) Cheap Bluetooth and amplifier combination (3 watts) Step 1: Wooden fence Take wood, cut into two 30x14 strips, and two 38x14 and 34 x 26 mm backplanes (all portions have a thickness of 2 mm). Stick these four strips together to create a box and place the backplane on one of its faces. The final size of the box should be about 30x14x28 mm. I also cut some holes on the back and side of the box, and fill them with epoxy resin so that LEDs can be luminated by it. LEDs illuminate in different colors. Step 2: Electronic products If you connect all things as shown in the circuit diagram, use 5V and GND in the USB cable to identify GND and power cords in the data cable, connect it to the charger of the PC port, and use the multimeter to find 5V B / w two lines. I also added a small ceramic cap B / W 5V and GND. Step 3: Making a speaker appearance For the face, the metal plates and two holes are used for two speakers (if possible, please use the speakers with built-in housing because they can be better adjusted, I have only one with a housing). Connect the speaker line to the amplifier and stick it to the front of the panel to make it look more beautiful. Now put all things together and stick the whole housing. Step 4: Results For better completion, I made some cutting wood and cloth (I applied two layers in front, the first layer is more transparent), and finally give the wood to increase comparison, yes, it is completed here. . Considering the performance, since the output power of the amplifier is high, the speaker power is high, so the diaphragm is started to impact the speaker wall and the output is distortion, but more vocal, more vocal output Very good, and because the speaker comes from smartphones, the sound quality is very good. Under 75% volume, I have achieved best results for each type of song.

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