@teknotrek: DIY Bluetooth & USB MP3 Player Circuit Diagram! 🎶 Learn how to connect a PAM8403 Audio Amplifier with an MH-M18 module to build a 2-in-1 DIY Bluetooth speaker and external USB MP3 Player! This step-by-step circuit diagram animation shows how to wire speakers, resistors, control buttons (Volume, Next, Prev, Power), and an external USB connector to play your favorite MP3 files. Perfect for electronics hobbyists and DIY audio enthusiasts looking for a versatile audio project! #electronics #diyaudio #mp3player #bluetoothspeaker #circuitdiagram #shorts #pam8403 #teknotrek #audiophile