So let's check and see if the tabs that we just created are going to clear the battery holder. I can take the solar cell folder and decrease the opacity, try 40%. And let's hide the solar cell and look straight down from the top. Let's just click on top here and see if we can see the tabs through I'm not seeing them right now. If I right click on the solar cell holder and choose move should be able to turn this around and see if we can spot the tabs at all here. So you can see the outline of the tab right here, this rectangle right here.

Let's go ahead and change the opacity a little bit more. Let's cancel the move. Right click opacity control and let's go to 50. So now we can see a much better if I choose the top and I try and move solar cell holder just put it at a slight angle. So first of all, if I put them like this, we have a little bit of conflict with the battery hold Right on this corner where my mouse is, if I bring the tabs so right now one tab is here that you can see through, and the other one is budding up close to the battery, but it ends right about here so it doesn't even get close to the battery. So we should be good, we should be clear for now.

So like we said, we're going to take some screws, and we're going to bring them through the bottom of this battery holder and put them into the tabs that we just created on this solar cell holder or the cap. Before we do that, let's ask how this clear acrylic tube is going to match up with the battery holder. And when we think about fasteners, there's a lot of different fasteners of course that we could use Probably the most common fastener is, of course, screws and bolts. And you can never underestimate the use of screws and bolts. They are, you know, extremely popular for for a reason, because they're, they're very efficient, they are inexpensive. And we have a lot of standards that are set behind them.

And so they're they're quite easy to get information on as well in terms of their strength and in terms of being able to you know, manipulate them. So for this here, what we could do is create a lip on the bottom of this piece that would fit in a snug way into this clear acrylic tube. Let's go ahead and do that. So let's check the let's go to inspect measure, check the inner diameter of this clear acrylic tube, and we set that at three. So let's isolate this solar cell phone Right click isolate. Oops, sorry, not the solar cell holder, but the battery holder, or what we call the top.

Let's isolate that. Now we have it by itself. Let's activate it. Let's go on to this bottom face sketch create. And let's create a lip. So we got a sketch.

And we're gonna have to create two circles here and go to sketch dimension. And we said that the acrylic acrylic tube is at three inches. And we're just going to want to go slightly smaller than that. So we could put this outer circle at say two points if we wanted the job Just go slightly underneath that by save five thousandths of an inch could be appropriate. Let's go ahead and try that. And because we want it to fit very quite snug and then let's set this at an appropriate diameter.

And so we can set this at let's do 2.75 for right now. And let's go to create extrude and pull this down. Not quite sure as to how far that should be pulled down. For right now we can just estimate and we can say Let's say negative point four. I have two periods in there, hit enter. Now let's isolate the top and activate our assembly.

And so now we have somewhat of a lip that this clear acrylic tube can fit around. And it should be very close on diameters. And what we could do is we could put screws into this lip, we could do say, just one on each side. I don't think it's necessary to do four all the way around. And that's how I would say you know, mostly based on just feeling in turn of what we're going to need for strength I think for all the way around would be probably a bit much these are fairly light materials we're working with. This is plastic, and this is plastic as well.

Now that we have that lip created, let's go ahead and pull in some screws, some fasteners and see what they're going to look like to hold this top piece on. Now with respect to fasteners and the CAD models of any screws or bolts that you might need, you are pretty much never going to have to create a fastener from scratch in CAD. There are tons and tons of sources to get fasteners. A really good one is McMaster again. So we need to pull in a screw here. So let's go to McMaster.

So back to the same place. Let's open a new window here. And we can type we can click on screws. Actually, when we go back to the model here, I am not gonna want a screw head hanging off the side of this, it's going to, it's not going to look too nice, it's not going to be flush with the rest of the design. But what we could actually do is use a set screw, it's essentially just a screw without a head on it, and it'll sit more flush and it should still hold. This is for a prototype.

This should work quite well. So let's get a set screw instead. So I clicked on screws, and let's see if we see set screws here. Here we go set screws. And we could just choose when you start to choose fasteners, there's a ton of different types of fasteners, but typically, you know you're not going to have to be extremely picky. Let's choose a cut point set screw.

That should be okay. And now we need to choose a. There's some different materials here. So the first one is an alloy steel cut point set screw. Here's another alloy steel. And then down here are some stainless steel, cut point set screws stainless steel, so we know that again, this is going to be outside and stainless steel holds up very well to corrosion resistance when it's outside and we're definitely going to want fasteners that are corrosion resistant.

So we want stainless steel. And so again, we don't have to be terribly picky. This says stainless steel cut point setscrew. Let's click on that and see what we find. We need to choose a length of the setscrew and we need to choose a diameter so here's the length and in the English system, the diameter is essentially going to designated by this here 264 440. The smaller screws are designated in that way but then once you get up to a little bit larger screws to a quarter inch and larger you see the actual diameter here.

So one quarter inch in diameter of the screw, five sixteenths inch in diameter. So let's go ahead and go with just below a quarter inch 1032. And let's choose a three as long screw. I click on product detail, I need to download this because I want to bring it into my CAD model. So our different options are for the file type would be 3d SolidWorks 3d steps. So we we've talked about both of those SolidWorks and step files will work well with fusion 360 I could choose either one Though I'm going to choose SolidWorks and hit save, that goes to my download file, I'm gonna go back into fusion 360 and click on Upload Select Files, I'm going to go to my download folder, and I should see the set screw here I'm going to double click and upload it.

So now we've pulled in a screw quite quickly, it just took us, you know, five minutes or less should be able to find any fastener that you want in McMaster or a lot of other companies that you can buy fasteners from. And once you're done with your design, you can just order the part numbers will come with and you should be able to just order the screws straight ahead. And so let's pull in this setscrew given Just a minute here. Let's hit okay, as we typically do, let's right click, let's break the link. And so now we have our set screw in here, let's just pull it down and see if it's try and pull it into place like this and see if it's gonna be close on size here. It's changed the opacity on the battery holder which I call the top and we can see so this set screw is going to sit pretty much flush with the outer surface like it is now and we need to make sure that it you know, at least goes mostly through I'm not Really in the center right now pull it over.

It definitely looks like it's going to be close it looks like I go all the way through that lip but I don't go too far through it's not too long and the size actually looks close. And so this set screws should work. Let's go ahead and create some holes in the acrylic tube so that we can place the set screws a little bit more accurately. Let's isolate the light cover. So first of all, activate it and then let's isolate it. Let's put some holes in the side of this acrylic tube.

So now what I need to do is there's a couple different ways we could get holes in there. Let's expand the tree on our light cover here. And if I expand origin, let's show the origin by clicking the light bulb. So our origin for this piece now shows up. And I should be able to draw on this plane a circle. And then I should be able to cut both ways from that circle to create my holes.

Let's see if that works. So let's go to sketch, create sketch and choose that plane. Now I'm just going to create a circle here. I'm not quite sure exactly how far down yet we can change that later and set the diameter on this. Now, to think about the diameter Here, these are holes that we definitely could drill by ourself at home quite easily with, you know, with just a drill and a drill bit. But to set a diameter here, let's hit Enter.

And I'm gonna go back to McMaster really quick. And I have it pulled up here. So outside diameter is point 190. And I'm gonna want the hole that I drilled through to be slightly smaller than that. So let's go ahead and Google 1032 tap drill size and for a 1030 to one, five Nice Oh. So let's make the whole at 150,000.

Right now, point 150 and hit Enter. And then let's set a distance from the top. So that point to five right now. Stop sketch. Now I have just my regular circle here, and let's go ahead and create extrude. We're going to be doing a cut extrude click on the circle, we can actually extrude symmetrically so we can extrude to both sides instead of just extruding one way, and we can always do this one we extrude and we need to choose how far We extrude and let's set an exact dimension here.

Let's go ahead and cancel that for a minute. The outside diameter is going to be 1.625 that looks like that's at an angle. Let's cancel that inspect measure. From here to the outside and 1.625 looks good. So 1.6 to five. I got to create extrude.

Again, click on my circle, and let's go symmetrically for a distance of 1.625 and our holes are in our acrylic tube now Let's isolate, go back to our assembly. And let's go ahead and assemble and pull our screw into this hole here should be able to pull up you can see that it grabbed a cylindrical made but we don't want a rigid mate actually, that looks good. So now my screw is in place. If I pull this up, though, looks like I'd want to be a little bit higher with the position of that hole. So I can go back to the light cover. Let's just isolate it again.

And let's just add it to the sketch that we just created. Let's edit that. sketch. And let's pull this up to say, point. Point two. Let's pull it up a little bit higher.

Point one, five, stop, sketch and isolate. Let's just pull it back down to point two real quickly here and set this up. Point to stop sketch. And that looks good. So now we have our set screw going through. Let's see if it again, makes it through quite well on the backside that should be fine.

Now I want to put a set screw on the other side as well, we said we would use two of them. So this time I can actually right click on the screw, choose Copy, let's click on in the open here and choose Paste and it just added another set screw of the same type for me. So now I have two of them in this model and let's go ahead and just assemble it into place. It put it in the wrong way I just simply need to flip it with for a rigid command. And that's in place now. Now let's find some fasteners to go through the battery holder into the solar cell folder.