4 Channel 5V Relay Board

It is a relay card whose contact is triggered by 5v. It can be used with Arduino and other microcontrollers. In multi-channel relays, Vcc and Gnd terminals are common. There are trigger pins such as In1, In2 for each relay. Simply send a signal to the trigger ends of whichever relays you want to use on the module.

The trigger signal draws 20mA current. Since it can switch voltage up to 30V 10A DC and 220V voltage up to 10A, this product can be used in many projects. Thanks to the NC, NO and COM terminals on it, both short-circuiting when the relay is triggered or turning on the energy when the relay is triggered can be done with this module.