View Full Version : difference between spdt and dpdt switches?
06-24-2000, 06:39 AM
What's the difference between spdt and dpdt switch's? does anyone know?
06-24-2000, 01:12 PM
single pole double throw
Double pole double throw
A pole is a curcuit that is closed (ON) or opened (OFF).
If you have two (as in double) you can connect or disconnect two curciuts at the same time with the switch.
double throw: when you flip the switch one way it can connect a wire (A) to another wire (B) or if flipped the other direction connects wire A to a third wire(C).
Single Throw would connect wire A to wire B if flipped one way (ON) and when flipped the other would connect to nothing (OFF)
Basically a ON-OFF switch.
The advantage of DPDT
is that it can be used in many different applications such as turning off a light and turning on something else at exactly the same time and with only one flick of the proverbial wrist.
Switches are made in many of these varieties such as 8PST, SP4T (basically a reistat or rotational switch), etc...
06-24-2000, 06:26 PM
just wondering what this is about.
06-24-2000, 08:08 PM
Well, just to assure you guys...
spdt and dpdt switches sold at radio shack are Y2k compliant! Thank God. Otherwise, you know how all the switches around you would crash and then catch fire and then...well, yadda yadda, you get the point
Take a look at this
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