Buzzer for Arduino (Passive and Active ) Size:Active DC-: module DC power supply

DC-: module DC power supply negative (trigger terminal negative voltage)

5V 1-Channel Relay interface board and each one needs 15-20mA Driver Current

and temperature sensor module with I2C and SPI interfaces

Full speed USB device interface

10 mpa > 10 l/min

Buzzer for Arduino (Passive and Active ) Size:Active DC-: module DC power supplyA 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