how 14 pin(4dpt) relay works??

Discussion in 'General Electronics Chat' started by cktcrazy, Jul 29, 2011.

  1. cktcrazy

    Thread Starter New Member

    Mar 27, 2011

    can any one suggest me how a 4pdt(14 pin dpdt) relay works,
    when we are giving Vcc power supply to it.

    is it like after power supply the 4 COM pins connected to respective NO pins as long power supply is there to the realy !!!

    can 14pin relay be controlled by mcu??

    help meeeeeeee!!!!!!

  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    First, are you talking about a specific model? If so, please post a link to it's datasheet.

    I found this example

    As you said, as soon as you apply power to the coil, the NO contacts will close and stay close as long as power remains on.

    If you find a relay that doesn't exceed the output current specification of the MCU and can be activated by the MCUs output voltage, yes. Otherwise you put a driver (transistor etc) between MCU and relay. The example I posted cannot be driven directly by an MCU output.
    cktcrazy likes this.