 Can everybody understand my accent? Good. If I'm speaking too quick, let me know. So I'm Peter Jackson and for the last two years I've been building a sombrero. Not full-time. I've had other time off doing other things, but I'm just going to briefly tell you about how I built a sombrero and how I would do things better in the future and things like that. So a lot of the people ask me, why did you build a sombrero? So I should explain. I've got two hats. This is my everyday practical hat. You can walk around supermarkets and things and not have a droop on things. This is actually the sombrero. I thought it was just light. The first screen was not cool. Right. So this is the original sombrero. So why did I do it? Well, I was with the Denver Hat Club and we were on a night out and this hat fell out a window. There was a party going on. So we tried to throw it back up into the flat, but it didn't work. So we got a sombrero. So what do you do for sombrero that you wake up next to? You put LEDs in it. So along the way, I did my first pretty circuit board design. So you can have a little bit of a look afterwards. There's, for each of these pixels, there is a separate little circuit board. There's also surface mount soldering on it. So I've never done surface mount soldering before. It seemed very scary. It's not at all. If you weren't here, you should have been at the surface mount soldering workshop being run by Denver Hat Club colleagues. I highly recommend surface mount soldering. And who wouldn't want to walk down a dark alley with the sombrero? Unfortunately, it's still light at the moment, but later on if you see a swirling sombrero walking around coming to speak to me and I'm sure you can have a go. So a little bit of tech geekiness. The sombrero has 27 LEDs on it. Each of them RGB. I meant to do 28, but the spacing was a little bit off and I didn't want to move them all around, so the 27 it is. Each individual module has the hardware is based on something called BlinkM, which are little pixels, about 10 pounds each. I didn't put these in the hat. I'm not that rich. But the hardware design is very simple and there's also a third party firmware called CYZ RGB, so there's a slight fork of that. So I put that onto the hat. So each of them has got a little 80 tiny microcontroller and inside the hat there is an Arduino clone for Michael, really small board. Originally when I built this, this is like version 2, version 3. It had a full size Arduino with a shield. So when you're wearing a hat, you ended up little 0.1 inch dimples on your head. It was not comfortable. This is still a bit perched on your head. It has an integrated TV be gone. So there's two infrared transmitters here. I promise that was not why those plasmas aren't working. And to control it, you can probably see it is spinning around a bit. As I say, it's a bit bright. To control it, there's a remote control. So you know these quite commodity Chinese lamps and things? You get the remote control for that. So it has different colors on it. So I put an infrared receiver on it and you can change the colors. I used last camp's badge, EMF 2012 badge to decode this. It's an Arduino library. I didn't do any groundbreaking electronics or software. I just like mashed up everything and put it together. It runs on four AA batteries that are sort of in a nice battery box there out of harm's way. Rough power consumption when all LEDs on, about one and a half watts. Battery life about five hours, like one evening basically. And yeah, if you take it in the rain, it's not going to go too well. It's not going to do anything harmful. It just might corrode a little bit. So I'm glad it's not raining. So yes, the Ingress rating is IPX0. Put your finger in it, you can get it all wet and things. So some slightly less geeky statistics. As I said at the beginning, I've been working on this for about two years. Hardware cost is about £70. I got the LEDs out of a junk box that was in our hack lab. I've lost track of how many hours I spent on it. How many times I've woken up and finished working on the hat and it's white and I have to go back. Only one person has bought me a drink. That was at a maker fair in Edinburgh. So I'm quite partial for cider, Matty. Yeah, walking around for the last couple of days, I was on volunteer security shift with the practical hat. So this was built in about two days because I knew what I was doing. The other thing is straw hats. You'd never guess they're not very heat resistant. So I got a little bit fed up and was using a hot air gun. So you can see later it melts a bit. Well, there's a unique smell of burning straw. And yes, next steps. I keep saying I'm going to do an instructor on how to build a hat. Might do, might not. And in the week, in the last week, I was putting a beat detection module so it would react to sound. So that's almost finished. And I've got a few minutes to show a bit of a video of it in slightly more dark. No, I don't think I've got the video. So I've got probably a couple of minutes for questions. If not, just grab me afterwards to ask me questions. Thank you. Any more questions? So the question is how do you control the TV we got? Well, at the moment, there's a slight bug in that when you switch the hat on, so there's a switch on the battery pack, the TV we got does its cycle. So you've got to be slightly careful where you are. Of course, what you should have is you have a mate with a hat that doesn't have my oldies on it with a TV we got and this one. But yeah, who's going to get the blame? So what I've got is this control has flash, strobe, fade, and smooth. So I've just programmed one of those buttons. So that goes to the infrared there. And then the Arduino just sends a signal to the TV we got. It actually just does a reset because that's how the TV gone work. And then it does its two minutes of things. The infrared LEDs draw quite a lot of current. So at some points, the other lights sort of move more or something like that. Any other questions? Anything else? Thanks, Peter.