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which allows you to remove the conventional push-buttons troubles
LED Off to turn off the LINK light to enter power saving mode
DC Current per I/O Pin: 40 mA
This buzzer is an active buzzer
Output Voltage: -15V
LM386 Audio Amplifier Module MS5540 which allows you to removeIntroduction : LM386 Audio Amplifier Module 200 Times 5V 12V Input 10K Adjustable Resistance. Features : On board LM386 Chip Gain= 200. On board speaker wiring block. On board 10K variable resistor, you can adjust the volume with it. On board power indicator. The chip pin leads, can be directly input audio signal Operating voltage: 5 ~ 12V Size: 41 x13 mm