Aopen dx3rplusu Manual Do Utilizador
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Hardware
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Open
A
2.6.16 External Speaker Connector
If you want to use external case-mounted speaker instead of internal buzzer, the 4-pins external
speaker connector can let you connect with external case-mounted speaker.
GND
N/C
N/C
+5V
N/C
N/C
+5V
Pin 1