Model A+, B+, 2B, 3B, 3B+, Zero and Zero WĪs you can see, there are three basic schemes.

In the following images we can see the different layouts of the existing models at the moment: Model B (Rev 1.0) Model A/B (Rev 2.0) Here we offer you all the diagrams of the different boards that exist at the moment. Not all boards and revisions have the same GPIO schematics. We can also see others such as SDA, SCL, MOSI, MISO, SCLK, CE0, CE1, etc., which we will explain their operation later. Special GPIOs: Within these are some pins for a UART interface, with TXD and RXD connections that are used for serial communications, such as connecting to an Arduino board.Normal GPIO: are configurable connections that you can programme for your projects, as we will show you later.On current boards they are marked as GND. That's why you will only find them on earlier models of the Raspberry Pi. DNC (Do Not Connect): are pins that have no function at the moment, but in future implementations are used for other purposes.Remember that they are unbuffered and you must be careful not to damage the board. They can serve as a power supply, although you can also use other sources (batteries, external power supplies, etc). Power pins: you can see 5v, 3v3 (limited to 50mA) and ground (GND or Ground) pins, which provide power at these voltages for your circuits.

As you can see in the pictures below, not all pins have the same function: The first thing will vary depending on the revision of the board you have or the model.Īll pins are 'unbuffered'.The pins do not have protection buffers, so you will have to be careful with the magnitudes (voltages, current.) when connecting components to them in order not to damage the board.

But for that you need to know their characteristics and how they are programmed. And with them you can make a multitude of projects, from making LEDs flicker to much more sophisticated ones. GPIOs represent the interface between the Raspberry Pi and the outside world. These pins are included on all Raspberry Pi models, so you can make interesting projects just as you would with the Arduino. a series of connections that can be used as inputs or outputs for multiple uses. GPIO (General Purpose Input/Output) is, as the name suggests, a general purpose I/O (Input/Output) system, i.e. In future posts we will also show you how to connect Arduino and Raspberry Pi using these pins to achieve great projects combining the power of both platforms. That's what this article is about, to open the doors of this world and introduce you to programming and the possibilities of GPIOs. The Raspberry Pi GPIO pins are the great forgotten ones, but knowing how to use them opens up a world of possibilities.

Basic stamp editor for raspberry pi