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Studying for a test? Prepare with these 5 lessons on Home-made robots.
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OK. So let's go ahead and put our single pole double throw lever switches on our bot. Now, we want to make sure that we attach these at the ends and that we put them so that they sort of stick off the edge. And they're at about a 45 degree angle. Like that. We're going to take a little bit of hot glue, put a little blob on that corner and a little blob on that corner. And then, we'll take our switch, and we'll set it there. We kind of want to make sure that the hot glue does not interfere with the lever. There we go. Like that. So now what we're going to do is we're going to put some batteries in. And this is basically just to provide some weight to help hold the battery holder and switches in place. Now, when you do that, be careful. Because you don't want these two wires to touch. If the two wires touch, they'll short out the batteries and melt the housing and cause problems for you. So you don't want that to happen. So what we do want to do now is we're going to take another wire-- this is a solid-core 22 gauge wire-- and we're going to strip off a good bit from the end. Let's take off about three quarters of an inch. And we'll just take that and run it through wire strippers there. And pull that off. And then, what we're going to do with that wire is we're going to hook it through the two holes. You can see there's holes in these connections here. We're going to hook it through those two holes. And then, we're going to connect this wire to it. So that's going to allow us to connect two sides of our single pole double throw switches and give us an extra wire that we can use for lighting up our LED eyes in a little bit. So we'll take our needle-nose, and we're going to try and bend the wire so we can loop it through. Let's see if we can make this work. It's kind of tricky to do. But if you can get it, you want to run the wire through the hole in the leg of the switch because it's going to give you a better connection when you solder it. There we go. It just takes a little bit of time working on it to get it in. You can see I think I popped this-- I did. I popped this switch loose. So what I might do is actually just peel this hot glue back up. That's OK. You want to make sure you get all that hot glue out if that happens to you. Just peel it up out of the way. And this is actually a good thing because it may mean that we can connect these switches a little bit more easily. But I'm going to put some more hot glue down and then put the switch back in place. There we go. Again, make sure you keep your fingers out of the way of that hot glue because it will stick to them. And it's definitely not fun to get it on your hand. And there we go. So now we have the switch in and the wires connected. Like that. OK. And let's see if we can-- I want to maneuver a little bit more and see if we can get a little bit more of this wire through. Yeah. OK. So now we can take our red-stranded wire. And we have a little piece of the solid-core that we can tie onto and solder everything together. So we're going to cut this wire down. And then, we'll take our strippers and strip off a little bit of the excess. There we go. And then, we can take this red wire and bring it up. And we just want to twist it around that solid-core wire. OK. Like that. So now, we've got a good connection, and we can solder that in place. So let's go ahead and do that. So we're going to take our soldering iron. Make sure we tin the tip, remember. A little bit of tin there. And knock off the excess. And then, I'm going to put the soldering iron right there and try and make sure I can get enough heat to the wire to get the solder to hold onto it. There we go. It's good there. And there's just one little place here where I need to make sure I've got a pretty good connection. Here we go. Now, we need to connect the next wire, which is going to be our white wire. All right. So in order to do that, we're going to take a white wire here. And I'm just going to take a little bit of the end of that off. And I think what we're going to do-- take off about this much of the insulation. And so we're going to run this wire through here. Like that. We don't need the insulation in the middle. As long as we keep the white wire away from the black wire, we should be fine. I'm sorry. As long as we keep the white wire away from the red wire. OK. There we go. So this now gives me-- so we want to make sure we keep that wire away. Like that. Now it gives me a place to connect to for the black wire. So this is the other side of our circuit, and we're going to connect to that. We'll cut it right here. And then, we'll strip off the excess insulation again. And now we're going to connect our black wire. So now we should be able to take our solder and solder all the parts together. So we're going to solder the wire and the switch right here. And then, we're going to solder the black wire and the white wire together right here. And then, we need to solder the white wire to the other side, the other switch. And so now we have our connections. Now, we don't need a whole lot of extra wire there. So we can trim off the excess. And it's OK to sort of push it out of the way. Definitely don't want your black wire that's connected to the white one here to touch the red one. So keep those things apart. I think I'm going to put a little bit more solder on that joint there. There we go. That way it all sort of flows together. And again, we want to make sure that those switches still work.