RELAY REED SPST 500MA 12V (1 piece)

let's now wire the interface relay to turn on this lamp here so first we'll power up the relay coil it's 12 volts so I need 12 volts here positive going to the positive of the relay coil and negative going to the negative of the relay coil if I turn it on this relay should energize it clicks in so that's good now we'll power this lamp the 24 volt lamp through this power supply so that'll be my power circuit so positive goes in there the other side of the contact for the interface relay goes to the lamp and the negative side and the negative side of the lamp goes to the negative of the power supply so if I turn this on you can see nothing happens because the contact is going through the interface relay that needs to be energized for that to turn on let's see if I turn this on whether that energizes or not and what do you know so we've got the current for this one this relay here the coil