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Albert Einstein He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).


The first integrated circuit invented by the engeneer Jack S. Kilby1 (1923-2005) contained only a few transistors. Texas Instruments.
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Homemade bluetooth speaker, 3D printed case


bluetooth speaker best price review



Full part list

1 x Bluetooth receiver LINK
1 x Boost converter module LINK
1 x Battery charger module LINK
1 x 50k Dual potentiometer + switch LINK
1 x push button LINK
2 x 55mm Speakers LINK
3 x 18650 3.7 LiOn batteries LINK
2 x LED LINK
1 x Drilled PCB LINK
2 x TDA2030 amplifier LINK
8x 100k resistor LINK
2 x 4.7k reisstor LINK
2 x 1R resistor LINK
4 x 2.2uF capacitor LINK
2 x 22uF capacitor LINK
2 x 100nF capacitor LINK
4 x 1N4001 diodes LINK
2 x 2200uF capacitor LINK
Wire, soldering iron, solder, thermo tubes etc...


Homemade bluetooth speaker part list

As for the case, it is designed in blender. Downlaod the STL files from the link below and print the parts with PLA material, 15% infill, 2 layers and a nozzle of 0.4mm. I've used my dear Anet E10 printer to print the files, and the print quality is amazing.


Downlad the STL files here:

Homemade bluetooth speaker part list




Extra options for amplifiers

TDA2030A module LINK
TDA7498 2*100W LINK
TDA7492P 50W+50W LINK
TDA7297 2x15W LINK