9v Relay Pin Diagram. In the above circuit 5v relay is powered by a 9v battery. Uxcell 10 pcs jqc 3ff s h dc 9v coil spst 4 pin pcb electromagnetic power relay.
In the above circuit 5v relay is powered by a 9v battery. An on off switch is added for the switching purpose of the relay. Used to trigger on off the relay normally one end is connected to 5v and the other end to ground.
Determine the common pin of the relay when the relay is activated.
At the initial condition when switch is open no current flow through coil hence common port of relay is connected to no normally open pin so the. Place the relay s rated coil voltage on these terminals. The polarity of the voltage does not matter. 5v 5 pin relay module.
