[Lập Trình Nhúng A-Z][G22] Mạch Giải Mã Âm Thanh Bluetooth XH M Serial – MH-MX8 4.2 (M18/M28/M38)

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📌 THÔNG SỐ KỸ THUẬT M18:
✔️ KEY: The end button control (4 keys function, need to add another resistor
✔️ MUTE: The mute control end (mute when 3.3 V, output level play when output low level)
✔️ VCC: The positive 5 V power supply (3.7 V lithium battery power supply need to short circuit diode)
✔️ GND: Power supply cathode
✔️ L: The left sound channel output
✔️ R: The right sound channel output

📌 THÔNG SỐ KỸ THUẬT M28:
✔️ 5V: The positive 5 v power supply
✔️ GND: Power supply cathode
✔️ VBAT: The positive 3.7 4.2 V lithium battery
✔️ L: The left sound channel output
✔️ R: The right sound channel output
✔️ AGND: In the audio

📌 THÔNG SỐ KỸ THUẬT M38:
✔️ 5V:The positive 5v power supply
✔️ GND: Power supply cathode
✔️VBAT: The positive 3.7 4.2 V lithium battery
✔️ L + / L -: Left sound channel output (directly connect the speaker)
✔️ R + / R -: Right sound channel output (directly connect the speaker)
         

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