Beginner Electronics

Beginner Electronics – 13 – Switches

what's going on everyone my name is Kota moore and welcome back to electronics episode 13 in this episode we are going to be talking about switches now

switches seem really simple and I'm sure a lot of you guys are just gonna skip right over this video but for those who who are still watching this video that's good because there are a lot more to

switches than you might think there are many many different types of switches and many different ways switches can work and there's some terminology that we need to learn if you want to

understand what I'm talking about when we have to add a switch to one of our circuits now there's many different types of switches like I said here is something called a slide switch this is

a toggle switch and these are dip switches dip switches are really tiny but they fit into bread boards very nice so there are a lot more than these and there's many different types of switches

but switches also work differently depending upon how they are made and what they are so when we think of a switch we can think of say a light switch there's an off position and

there's an on position if it's off the lights are off if you turn it on then a connection is made and the lights turn on in your house so let's get the schematic symbol for a switch that might

work like that basically we have our wire coming in and then we have a little dot here with a wire coming out of that and then we have a dot down here and a wire coming out of that this is the

schematic symbol for a switch this switch would be in the off position because there is an open connection between the two wires they are not connected however if we drew this a

little bit differently this is a switch in the on position because now the circuit is closed but anyways that should be pretty simple to grasp so that's the schematic symbol for a

regular switch if it's off the connection is open and there is no connection between the wires and once you turn it on this little flap will close down here and make the connection

for you now this type of switch is often referred to as an SPS tee switch this stands for single pole single throw and as we go on with the different types of switches today we are going to learn

what a pull and a throw is in terms of switches so let's look at another schematic symbol for another switch here we are going to look at a single pole double throw switch and the switch is

going to start pretty similar it's going to have a little wire out here and at first it's going to be touching another wire with a dot on it like so so it looks like our normal

switch here except below it there's also another dot in another separate wire now what in the world could this mean in terms of a switch well what a single-pole double-throw

switch is is basically when it's in the off connection this wire and this wire will be connected so in the off position but once you turn the switch on this little lever will move down here and now

this wire and this wire will be connected in the on position in these two wires would be disconnected in our single throw switch here we only had one connection that was made and that was

when the switch turns on in our double throw connection though we have a position where the switch is off but it still makes a connection and when you turn it to the other position of the

switch when you turn it on it makes a separate connection like so so the amount of throws that a switch has is basically the different positions of a switch on an on-off switch

this is probably what it would look like what in the world could a pole be well a lot of the time you are going to see a double pole single throw switch now this is going to look pretty much the exact

same as our single pole single throw switch at first we're going to have this here and this like so and then for a double pole single throw switch we are going to do the same exact thing right

below it and draw a dotted line between these two things right here this is a double pole single throw switch so basically when it acts the same as a single pole single throw switch so the

connection is completely broken in the off position but it's connected when it's turned on in the on position a double pole switch does the same thing except it allows you to make two

completely separate connections when it's off nothing's connected but when it's on this wire and this wire will be connected and this wire and this wire will be connected so it simply allows

you to make more than one circuit connection going by the input of the same switch so I guess you guys can probably figure out what a double pole double throw switch is so let's try and

figure out what that would look like we are going to take our single pole we'll throw switch and we're basically going to draw that right here blow it and then to make it a double pull switch

to be able to connect more than one circuit to this switch we are going to draw the same exact thing right below it like so and we're going to connect these two little wipers with a dotted line so

here in the off position this wire here and this wire here would be connected while this wire here and this wire here would be connected to completely separate connections however they're

both active in the off position once we turn it on these little things would swing on down here to the next terminal and now this wire and this wire would be connected and this wire and this wire

would be connected you probably get the hang of it by now you're probably sick of me talking about stupid switches but it's important that we know this terminology so the number of poles that

a switch has is the number of separate connections that we can make separate circuits that we can plug into the switch and the number of throws that a switch has is the number of positions

that the switch can basically support so in on/off switch has two positions but a single throw on an off switch is only active in the on position but a double throw on-off switch has one connection

active in the opposition and one connection active in the on position so I hope that you guys understand that any questions whatsoever leave them down below in the comments I know that stuff

is getting really born and I apologize guys but we got to make sure that we understand this so thanks a lot for watching I really appreciate it and I'll see you guys in the next video

We learn about single/double pole/throw switches!

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