How to make a SPDT toggle control a DC motor Service Techniques

Single Pole Double Throw (SPDT) Relay Wiring Diagram. This is the diagram below to learn all the pin terminals of a Single Pole Double Throw (SPDT) Relay: The 2 COIL terminals is where the voltage is placed in order to energize the coil. Place the relay's rated coil voltage on these terminals. The polarity of the voltage does not matter.. This article will show you the wiring diagrams of different relays. You will learn how to connect 4-pin (SPST), 5-pin (SPDT), and 8-pin (DPDT) relays to a circuit. In general, there are only two types of relay you will ever use: breadboard/PCB-friendly relay (for simple electronics projects) and automotive relay (used in automobiles).

The NO terminal of the relay gets power only when the relay is powered. When the relay receives 12 volts of power, the relay's snaps from the NC position to the NO position. The red LED now shuts off and the green LED turns on. Related Resources. Relay Terminals Relay Wiring Diagrams SPDT Relay Wiring Diagram. Relay wiring diagrams of dozens of 12V 5 pin SPDT automotive relay wiring configurations for mobile electronics applications.. If you need a relay diagram that is not included in the 76 relay wiring diagrams shown below, please search our forums or post a request for a new relay diagram in our Relay Forum.