4 Channel 12V Relay Card
It is a relay card whose contact is triggered by 12v. It can be used with Arduino and other microcontrollers. However, its supply must be from a 12v source, the signal end can be used via microcontrollers. Vcc and Gnd terminals are common in multi-channel relays. 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. 30V to 10A Since it can switch voltages up to DC and 220V up to 10A, this product can be used in many projects. Thanks to the NC, NO and COM terminals on it, both operations such as short circuiting when the relay is triggered or turning on the energy when the relay is triggered can be done with this module.
When you want to use a DC product, the middle Add + to the COM end, or - to the NO end if you want it to be normally open. If it is desired to be normally closed, it must be connected to the NC terminal -.
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