Your Smart IOT

<div class="section tutorial-page">
<h3><strong>Hardware</strong></h3>
<p>This project really boils down to five buttons and a joy stick connected to the <a href="http://bit.ly/26nCnnf" itemprop="url" target="_bank" title="GPIO"><strong>GPIO</strong></a> pins on the <a href="http://bit.ly/26nCm2K" itemprop="url" target="_bank" title="Raspberry"><strong>Raspberry</strong></a> Pi 3 and an SD card fully loaded with arcade software. Let’s get started building this controller. Insert the SD Card into the Raspberry Pi . On top of the box, you will find blue prints for your controller layout. Use the provided hobby knife to cut holes labeled “Cut”.</p>
<h3>Buttons</h3>
<p>Remove the switches from the arcade buttons. Unscrew the nut, and feed a button through each hole and secure the button to the box with the nut. Once they are all in place, replace the switches.</p>
<p><a href="http://bit.ly/2erswuD" target="_blank"><img alt="alt text" src="http://bit.ly/2f2V4Xy" /></a></p>
<p><a href="http://bit.ly/2ertHdv" target="_blank"><img alt="alt text" src="http://bit.ly/2f2VNI4" /></a></p>
<p><em>The bottom pin labeled “COM” for common or ground on the switch is ground. The single wiring harness will attach to the bottom pin on the short right side of the switch. It is labeled “NO” for normally open.</em></p>
<h3>Joystick</h3>
<p>First, figure out which switch corresponds to Up, Down, Left and Right. To do this easily, you can unscrew the bottom metal plate like this:</p>
<p><a href="http://bit.ly/2ersxPd" target="_blank"><img alt="alt text" src="http://bit.ly/2f2WxNE" /></a></p>
<p>The switches will be exposed and you can test each direction. With the orientation shown holding the joystick to the left produces this result:</p>
<p><a href="http://bit.ly/2ervgIb" target="_blank"><img alt="alt text" src="http://bit.ly/2f2YEAS" /></a></p>
<p>I labeled that top right switch “Left” which corresponds to GPIO Pin 7. Continue the same process for each direction and replace the bottom cover with the four screws along the outer edge.</p>
<p><a href="http://bit.ly/2eruRFE" target="_blank"><img alt="alt text" src="http://bit.ly/2f2V3CW" /></a></p>
<p>Once you have the orientation, unscrew the red ball from the top of the joystick handle, and remove the black washer as well. Unscrew the top metal plate, and feed the joystick from under the box lid. Secure the joystick by screwing the metal plate on top of the box. You’ll want to mark where those holes are and pre-cut a hole for each screw as well. Replace the black washer, and replace the red ball.</p>
<h3>Wiring</h3>
<p>You may have noticed some 6″ strands of wire and 20 female quick disconnects. You will need a pair of crimpers or there may be a crimp tool on your wire strippers already. You will build two wiring harnesses for ground. One wiring harness will have five quick disconnects daisy chained together for the buttons, and the other will have four quick disconnects daisy chained together for each ground pin in the joystick. Then nine individual wiring harness for each button and direction on the joystick. The ground on the button switches are the lone tabs on the long side of the switch. The same goes for the joystick.</p>
<p><a href="http://bit.ly/2ersy5y" target="_blank"><img alt="alt text" src="http://bit.ly/2f2WW2v" /></a></p>
<p><em>Single wiring harness with female end. You need nine of these.</em></p>
<p><a href="http://bit.ly/2ert184" target="_blank"><img alt="alt text" src="http://bit.ly/2f2UhWq" /></a></p>
<p><em>Ground wiring harness for the joystick with female end. You need one.</em></p>
<p><a href="http://bit.ly/2ert57K" target="_blank"><img alt="alt text" src="http://bit.ly/2f2X5Tu" /></a></p>
<p>_ Ground wiring harness for the buttons with female end. You need one._</p>
<p>In the video, each button and direction was labeled along with its corresponding GPIO on the box with marker. Below is a picture of the mapping. The individual wiring harnesses are attached on the tab that is labeled “NO” (Normally Open). It is also labeled pin 3 on the switch.</p>
<p><a href="http://bit.ly/2erutqS" target="_blank"><img alt="alt text" src="http://bit.ly/2f2Vmxx" /></a></p>
<p>For the power, audio and monitor cables, cut three holes in the back of the box, and feed those cables through them. I’m using a set of powered speakers for audio. Close the box, and get ready to play.</p>
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<p><a href="http://bit.ly/2erxCqN" target="_blank"><img alt="alt text" src="http://bit.ly/2f2Y0DF" /></a></p>
</div>
<div class="section tutorial-page">
<h2 id="emulation-software">Emulation Software</h2>
<p>In the video above you saw how easy it was to get up and running on your gaming machine. Let’s take a look at what’s going on inside.</p>
<p>Besides powering the Pi and restarting the Pi after adding ROMs you will not have to do anything else to get started playing games. The Image on the SD card is called Porta Pi Aracde and is a collage of several programs compiled by Ryan Bates at <a href="http://bit.ly/2ert2sE" target="_blank">Retro Built Games</a>. The image contains <a href="http://bit.ly/2f30Bx9" target="_blank">RetroPie</a>, <a href="http://bit.ly/2ery4VM" target="_blank">Emulation Station</a>, <a href="http://bit.ly/2f2YNnT" target="_blank">RetroArch</a> and <a href="http://bit.ly/2erwQtJ" target="_blank">Retrogame</a>.</p>
<p>Power the Pi, and connect a monitor through an HDMI cable. Once it boots up you should see the RetroPie home screen, then the Emulation Station home screen and then a menu which shows you the available system emulators and how many games you have in each emulator. Now is when you’ll want to get familiar with navigating through the menu and add your roms. You can fully navigate through the menus with your newly assembled gamepad, or you can use a <a href="http://bit.ly/24aI4pV" itemprop="url" target="_bank" title="install virtual keyboard raspberry pi"><strong>keyboard</strong></a>.</p>
<h3>A Little Background on the SD Card Image</h3>
<p><a href="http://bit.ly/2f30Bx9" target="_blank">RetroPie</a> is backbone of your retro-gaming machine. It can be installed on top of an OS like Rasbian. We left off the OS so you can decide which one you’d like to add or if you need one at all.</p>
<p>If you decide to add an OS, you can exit the emulator, and enter the <a href="http://bit.ly/26nCm2L" itemprop="url" target="_bank" title="Linux"><strong>Linux</strong></a> GUI by pressing F4. This brings you to a terminal window, and typing the command <code>sudo startx</code> starts the GUI.</p>
<p>To get back to the emulator, log out of the Linux GUI, and type the command <code>emulationstation</code> in the terminal window.</p>
<p>Without Rasbian the only commands you need are the F4 key to enter terminal window and <code>emulationstation</code> to return to the emulator.</p>
<p><a href="http://bit.ly/2ery4VM" target="_blank">Emulation Station</a> is the graphical front end that gets you easy access to your favorite retro games without a keyboard. Once you have built your controller, you will have all the buttons necessary to navigate through Emulation Station and play your legally obtained roms.</p>
<p><a href="http://bit.ly/2f2YNnT" target="_blank">RetroArch</a> exposes the functionality of a game or emulator. It is the front-end for <a href="http://bit.ly/2f2XZ2z" target="_blank">libretro</a> and can do things like raw video recording and netplay. It also allows for universal controls to be programmed – it currently is for this tutorial. This means that the controls set for ESC, Enter, Jump, Shoot, etc. are seen across all games in all emulators – you won’t have to set up your game pad every time you enter a new emulator.</p>
<p><a href="http://bit.ly/2erwQtJ" target="_blank">Retrogame</a> is a great tool which allows Raspberry PI GPIO-to-USB utility for emulators written by Phil Burgess for Adafruit. This is how the button mashing gets registered as keyboard presses. To change where the buttons are mapped to or to add more buttons head over to <a href="http://bit.ly/2ertfMh" target="_blank">Retro Built Games</a> .</p>
<h3>Adding Roms</h3>
<p>The easiest way to add roms is to use a USB Thumb Drive or SD Card with adapter. Format the USB drive to get a fresh drive. Add a folder called ‘retropie’, and insert it into your Raspberry Pi 3. Wait a few minutes, or look for the flashing <a href="http://bit.ly/1VNpzU4" itemprop="url" target="_bank" title="light"><strong>light</strong></a> on your USB to stop.</p>
<p>Pull out the USB drive, and plug it back into your computer. The ‘retropie’ folder will now have three sub folders: ‘BIOS’, ‘Configs’ and ‘roms’. Save your roms into the appropriate folder within the ‘roms’ folder.</p>
<p>Put the USB drive back in the Pi, and wait once more for the file transfer to finish. The roms are <a href="http://bit.ly/24wihsv" itemprop="url" target="_bank" title="automatically"><strong>automatically</strong></a> saved to the correct emulator folder. You now need to restart your Raspberry Pi.</p>
<p>Plug in a keyboard, and Hit F4 to exit emulation station. From the terminal window, type the command <code>sudo reboot</code>to restart your station. You should now see the menu expanded based on the roms you saved. Thus, if you added NES roms, there will now be an NES option in the menu. Instructions on obtaining roms is beyond th scope of this tutorial. You should only be adding legally sourced roms onto your Raspberry Pi gaming station.</p>
<h3>Test</h3>
<p>Once you have your buttons placed, the wiring finished and your roms installed, it is time to test your gamepad. Power your Raspberry Pi, and wait for the emulation station menu screen. Use the joystick to navigate through the different emulators. Button A will act as select or Enter in the menu, and B will act as a back button. The select button is escape for when you want to change games and get back to the main menu from within a game. From within a game A, B, & C will act as the normal fight and special buttons.</p>
</div>
<div class="section tutorial-page">
<h2 id="audio-set-up">Audio Set Up</h2>
<p>The simplest way to get audio for your arcade machine is to plug powered speakers into the audio jack. You can also change the settings in RetroPie. To use headphones, navigate to the RetroPie emulator and press A. Select Audio in the menu by pressing A again. Select option 2 to use headphones. select Option 3 to use HDMI. To get a portable solution-if you are making a cabinet, select option 4 and check out SparkFun’s Audio amplifier kit. Just be sure to tie ground from the amp kit to a ground pin.</p>
</div>
<div class="section tutorial-page">
<h2 id="resources-and-going-further">Resources and Going Further</h2>
<p>Go beyond the box, and customize your own arcade cabinet. <a href="http://bit.ly/2ert2sE" target="_blank">Retro Built Games</a> is a great resource for building arcade cabinets, navigating through RetroPie, EmulationStation, RetroArch and Retrogame, expanding roots to increase SD space, adding roms and much more. If you are having any trouble, the Forums on this site are excellent. There are also instructions for adding a player two, adding a coin acceptor, free plans for a MiniCade, and then random cool stuff like a Vending Machine and a folding dog ramp. Give this gaming maker some love.</p>
<p><a href="http://bit.ly/2f2VPzG" target="_blank"><img alt="alt text" src="http://bit.ly/2ersZgj" /></a></p>
<p><em>Photo Courtesy of Ryan Bates at Retro Built Games</em></p>
<p><a href="http://bit.ly/2f2WUrp" target="_blank"><img alt="alt text" src="http://bit.ly/2erxwPZ" /></a></p>
<p><em>Photo Courtesy of Ryan Bates at Retro Built Games</em></p>
<p>A table top vending machine seems like a worthy investment.</p>
</div>
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PiRetrocade Assembly Guide

Hardware This project really boils down to five buttons and a joy stick connected to the GPIO pins on the Raspberry Pi 3 and an SD card ...

PiRetrocade Assembly Guide

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