Finally I managed to build my first Bluetooth speaker. Now I am able to listen to music on a high volume while cooking. Yeah. And to my surprise it was pretty easy. And cheap. I bougth a 50 cent amplifier (OEP30Wx2) in China which is able to deliver up to 30 watts. The main work is done by a Bluettoh audio USB dongle, which I bought at Amazon for 3,50 Euro. Additional components I used: a DC/DC decoupler to prevent this anoying sound caused by a ground loop, a 10k logarithmic potentiometer, a step down conventer, a 12V power supply and of course two speakers. I tried Dayton Audio ND-65-4.
Here’s the schematic for the setup:
The hardest part was the wood working. But it really was fun. Here’s the result. Hope you like it: