Spdts are great for selecting between two power sources swapping inputs or whatever it is you do with two circuits trying to go one place. Connect the source wire to the center terminal.
An Introduction To Single Pole Double Throw Spdt Switches
How to wire a spdt switch. Spdts have three terminals. One common pin and two pins which vie for connection to the common. Spdt toggle switch single position dual throw xx. When the relay is powered the red led shuts off and the green led lights up. It makes one of two connections. I recently ran into a wiring problem and made an illustrated post on how i figured out the solution and some guesses as to why i came to the solution i did.
Below is the schematic diagram of the wiring for connecting a spdt toggle switch. When the relay isnt powered the red led is lit and stays on. Were going to connect a single pole double throw relay to a circuit to light up a led. Ok so were just crimping that wire against that terminal that comes out of our single pole double throw switch. You can use really any color wire you want as long as its copper or aluminum or something conductive. And the wire is sticking straight up and thats going to make it easier to connect to.
Terminal 1 is connected to one load or accessory terminal 3 is connected to another load or accessory. Terminal 2 is connected to power. Another common switch type is the spdt. A spdt is a bit more sophisticated. Most simple slide switches are of the spdt variety. One of the most common pieces of circuit bending hardware is the single position dual throw spdt switch.
Slide the signal wire through the terminal hole. The basic design of an spdt center off switch. A spdt toggle switch has 3 terminals. Terminal 2 is the terminal which receives the power necessary so that the loads on terminals 1 and 3 can be powered. And terminal 3 can connect to any load to power any device. This wire will supply the voltage or signal from the source to the switch.
Now that we know what each terminal pin represents we now wire it to a circuit for it to do a real world function. So a spdt switch can power either one of 2 circuits. Solder the wire to the terminal. Terminal 1 can connect up to any load to power a certain device. Here is a diagram of a spdt toggle switch. Bend the wire back securing it to the terminal.
Gallery of How To Wire A Spdt Switch
