bluetooth - I don't understand a couple of symbols on this diagram

Bluetooth Audio Amplifier Circuit Diagram

Deadbug bluetooth speaker circuit Bluetooth speaker wiring diagram

Circuit speaker bluetooth circuitlab deadbug description Bluetooth audio receiver module 10 watt bluetooth guitar amp

10 Watt Bluetooth Guitar Amp - Part 1 - Retrofit

Amp amplifier bluetooth circuit

Audio bluetooth module receiver schematic bt speakers stereo output 5v operation dc rarecomponents store

Diagram bluetooth speaker audio amplifier wiring channel circuit wireless using electronicsforu database twoDiagram bluetooth module receiver audio circuit xs wire couple understand symbols arduino connect don explains following found also online .

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Bluetooth Speaker Wiring Diagram - Database - Faceitsalon.com
Bluetooth Speaker Wiring Diagram - Database - Faceitsalon.com

10 Watt Bluetooth Guitar Amp - Part 1 - Retrofit
10 Watt Bluetooth Guitar Amp - Part 1 - Retrofit

Bluetooth Audio Receiver Module - Stereo Output - 5V DC Operation
Bluetooth Audio Receiver Module - Stereo Output - 5V DC Operation

bluetooth - I don't understand a couple of symbols on this diagram
bluetooth - I don't understand a couple of symbols on this diagram

Deadbug Bluetooth Speaker Circuit - CircuitLab
Deadbug Bluetooth Speaker Circuit - CircuitLab