![]() ![]() The image was created with an open source program called “Fritzing,” which can be downloaded at .Īfter mounting the circuit (this should be done with the Raspberry Pi power source off to not burn any component), connect the power source. ![]() To see what the montage in the breadboard looks like, see Figure 2. In my case, I used a 330 Ω with no problems. The resistor can’t be much larger because if the current is too small, the LED doesn’t turn on. If you don’t have a 220 Ω resistor available, you can use a larger one–with a larger resistor, there’s less current in the circuit, so the LED isn’t damaged. By using Ohm’s law (V = R*I), you need to add a 220 Ω (Red/Red/Black) resistor in the circuit. If you connect the LED directly to the 3.3V pin of the Raspberry Pi, you’d probably burn the LED, as it wouldn’t support the current passing by it. For that, you don’t need any kind of program, only to understand the circuit you’re going to build. To make it extra simple, you’ll start by creating a circuit that lights up the LED, without blinking. Usually, the “Hello World” for a system like that is a program that makes the LED blink. Knowing the board and these simple components, you can mount the first circuit. To learn more about these components and how to interact with them, see Frank La Vigne’s April 2016 Modern Apps column, “Writing UWP Apps for the Internet of Things,” at /magazine/mt694090. For this project, you’ll need a breadboard, three LEDs, resistors and wires. I won’t discuss all the content because that can change a lot, depending on the manufacturer (or from what you intend to buy). Therefore, unless you have a perfect memory, keep a diagram like that nearby (there’s one available at bit.ly/1WcBUS2). Note that the pin numbering isn’t ordered. The black pins are ground and the yellow ones are the GPIO pins that you’ll use in your programming. The Raspberry Pi uses two supply tensions: 5V and 3.3V. Every pin has a different purpose, as you can see at the top of the figure. On the upper side, you have the General Purpose Input/Output (GPIO) block (12), where you make all connections. In the middle of the board, you can see the processor (10) and the network controller (11). You can also see the Wi-Fi and Bluetooth adapter (9). On the left side of the board, you have the micro SD card slot (7) and a connector for an LCD display (8). At the bottom, from left to right, you have the power jack in the form of a mini USB (3), the HDMI video (4), the camera port (5) and the sound output (6). On the right side of the board in Figure 1, you can see the four USB ports (1) and the Ethernet connector (2). Figure 1 shows the board.įigure 1 Raspberry Pi 3 Model B with GPIO Initially, you should explore the Raspberry Pi and see what it has to offer. Once you have the board and the kit, it’s time to get to know the hardware. You can buy a case for the computer, but that’s not necessary, as you should keep the computer open to make the connections. Some manufacturers have created kits to complement it: prototype boards, resistors, LEDs, potentiometers, sensors and a memory card. You also need to use some extra hardware. If you use only the board, that would be the same as developing for a computer or a smartphone. ![]() To start, you can use the Raspberry Pi board alone, but that’s somewhat limiting. You can definitely do many things with it. ![]() The Raspberry Pi 3 has a Quad-Core, 64-bit ARM processor, HDMI video, Ethernet and Wi-Fi networking, Bluetooth, and four USB ports. This is a cheap computer-you can get one for less than $35-and it’s powerful. The Raspberry Pi, in versions 2 and 3, can use Windows 10 as its OS (though it’s not the full version, it lets you execute Universal Windows Platform apps to control its devices). Therefore, when I had the opportunity to work with the Raspberry Pi, especially using Windows 10 and Visual Studio, I jumped at the opportunity. I’ve developed a lot of software that works near the hardware, but I’ve never worked with a physical board where I have complete control of what’s being done. Volume 32 Number 5 Working with Raspberry Pi and Windows 10Īlthough I’ve been working with software for a long time, I’ve never interacted directly with hardware. ![]()
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