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MOTORB reverse engine
Full speed USB device interface
5V 1-Channel Relay interface board and each one needs 15-20mA Driver Current
DC-: module DC power supply negative (trigger terminal negative voltage)
Buzzer for Arduino (Passive and Active ) Size:Active MOTORB reverse engineA buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric. Typical uses of buzzers and beepers include alarm devices, timers and confirmation of user input such as a mouse click or keystroke. Buzzer is an integrated structure of electronic transducers, DC power supply, widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers and other
