Gadgetory

hello my name is Gary Sims remainder authority back in 2012 the release of the Raspberry Pi started a whole new revolution something similar to the home computer revolution that we experienced in the 1980s not only was this small board a fully functioning computer it also had a set of GPIO pins and allow different circuits and robots and all kinds of things to be built and on top of that it only costs $35 and now here we are a few years later and the Raspberry Pi foundation have now released the Raspberry Pi 2 so let's take a look at it ok let's just spend a few moments looking at the Raspberry Pi itself as you can see it's a nice small ball the same form factor as the Raspberry Pi 1 going around the ports here here we can see the microUSB port for the power here is the HDMI video connector here is the Raspberry Pi camera module connector audio going round onto this side we can see Ethernet four USB ports and then also here at the back are the 40 GPIO pins which we'll talk about little later here is the Broadcom SOC system-on-a-chip which includes the GPU and CPU for cortex a7 calls and then when we look round here on the back we can see the micro USD car and here is a Raspberry Pi model B raspberry one model B next to a Raspberry Pi 2 model B we can see some of the big difference here the model the original model B only had had less GPIO pins this one that has 40 there of course here was the SD card rather than the micro SD card then of course the processor is very different both Broadcom chips broad comet and an excellent job in making these chips for the Raspberry Pi foundation this one was only based on the arm v6 architecture single core running at 900 megahertz this of course is based on the arm v7 architecture cortex a7 again also running at 900 megahertz but it's a quad core in other differences you can see is that this one has two USB ports the model B plus had four this one has four as well so more power more memory microSD card more pins but the same form factor like the Raspberry Pi one the PI two can run a variety of Linux distributions the easiest way to store an OS for the PI is to use the new out-of-the-box software package or newbs for short it boots the pi and then allows you to pick which operating system you want to install you can even install multiple operating systems and dual boot viral but menu so I've just booted up the new out-of-the-box software distribution you can download from the Raspberry Pi website it boots up and gives you a menu that allows you to choose all the different Linux versions that can run on the Raspberry Pi as you can see the first one the first one based on Debian wheezy is the recommended one but there's also for example opening lick for the write with PI one and for the raspberry pi 2 there are some other ones here most of these only support the rise with PI 1 however these initial ones here at the top all support garage-door a 1 and the rise with PI 2 to install it you just click on it hit the install button and after you've confirmed it it will just start to download it onto the micro SD card after it's completed it will boot up into the new operating system very simple very easy to get yourself up and running on the Raspberry Pi 2 now one of the big announcements that was made at the time of the launch of the Raspberry Pi 2 was at Microsoft will be releasing a version of Windows 10 for the raspberry pi 2 this release of Windows 10 will be free through its windows developer program for IOT what yet isn't known however is what will be included in this free version of Windows 10 it will obviously be a cut-down version but how cut down remains to be seen there is one major operating system that unfortunately is not supported by the raspberry pi 2 and that's android the raspberry pi one didn't support it a moment it doesn't seem like that will change for the ride with PI to the Raspberry Pi foundation doesn't see Android as a priority and there appears to be some porting difficulty due to some missing drivers from Broadcom however of course this could all change just like the raspberry pi 1 the raspberry pi 2 is supported by openelec soon after the raspberry pi 2 was announced the open it project released a new build which supports the raspberry pi 2 here it is running boot up on my ride with I too I'm also using a remote control on my Android smartphone there downloaded from Google Play and as you can see it actually works absolutely fine and if we go here down to the system settings I want to see to show you that the system is running at 1920 by 1080 at a full screen and that's roughly around 30 frames per second it's managing okay test out the video playback capabilities of the Raspberry Pi 2 using open elec I've got two video files here both are video files are produced by my video editing software and I therefore I'm able to control the bitrate one is at around four and a half megabits the other one is at 15 megabits so let's go ahead and see how they go we'll go with the slower one first of all four-and-a-half megabits just give that going okay that seems to play fine but as I experienced on other occasions the mouse does jump around when you're trying to move it however the controls are still usable and I can press pause I can jump forward to other places and that all seems to work without any problem ok let's go back and try the other one now at 12:15 sorry and a heart 15 megabits per second let's start that now and that's running as well but again the same thing the mouse does jump around a bit however it is still usable if you just let them out gently go to the places you wanted to go to one of the attractions of the Raspberry Pi and in fact other SBC's is the ability to connect Hardware leds motors servo centers etc directly to the board and control more to that hardware from within a computer program the advantage of the PI over a microcontroller board like the Arduino or the embayed is that the general purpose input output pins GPIO pins can be controlled from a variety of programming languages and not just C or C++ it's a quick look at how you make an LED flash on and off using a Raspberry Pi ok besides the Raspberry Pi you're going to need a few little bits of equipment to make this easy the first is a solderless breadboard you can get these off eBay you can get them from sites like banggood okay and that's going to be our base where we build the small circuit we're gonna need of course an LED that we need there we're gonna need a resistor something around 220 ohms maybe 270 ohms and a couple of cables these particular cables have the connector that can go onto the Raspberry Pi and the pin that can go into the breadboard now building these circuits is quite simple first of all you need to take the LED notice that the LED has got one leg longer than the other you put the longer leg towards the positive so I'm gonna stick this here in row 25 and 24 okay we take the positive connect it to that pin and we're gonna put it around here onto the pin on the Raspberry Pi 1 3 5 7 pin 7 there okay then we take the resistor that comes out of the LED and we just put it in any other space there makes it fit naturally and then we're gonna go from the end of the resistor into pin 9 which is ground on this GPIO circuit okay and that's it there's the circuit board and now we have to do is use some programming to make that like a LED flash on and off okay so I've kicked it up everything to the Raspberry Pi the power the video cable the ethernet mouse and keyboard i've booted up it's running Linux now and I'm running a small Python script that controls this GPIO pin number seven causes current to go down it through the LED through the resistor and back through down to ground and as you can see the LED is flashing you get full instructions in the written companion please check that out and you'll find out how to write this program fully but as you can see just not very much money we have a fully working computer a very simple circuit that even a child a young adult a teenager anybody could have a look at and learn about electronics and computing and it quite very practical very hands-on so there it is the $35 Raspberry Pi - hope you've enjoyed this video if you have please give it a thumbs up also don't forget to write some comments below tell me what you think about the Raspberry Pi - tell me how you think it compares to other single board computers also don't forget to subscribe to and rathore --'tis youtube channel and also you can follow me on Google+ and I'll see you in my next video