Reading and writing from GPIO ports from Python

This tutorial covers the setup software and hardware to read and write the GPIO pins on a Raspberry Pi running the latest Raspbian operating system. We will showing how to read from a physical push-button from Python code, and control an LED. Related categories: Tutorial Step 1: Install Python development tools Open a terminal on the Raspberry Pi either via the desktop or by SSH'ing in (default credentials ...

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Pololu Dual MC33926 Motor Driver for Raspberry Pi (Partial Kit)

This add-on board enables a Raspberry Pi B+, A+, or Pi 2 to drive a pair of brushed DC motors. Its dual MC33926 motor drivers operate from 5 V to 28 V and can deliver a continuous 3 A (5 A peak) per motor. The default pin mappings make it easy to get started using our provided software, but the board also exposes most of the driver chips’ I/O pins for more specialized applications. This version ships as a p ...

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Raspberry Pi Breadboard Shield

Arduino has multiple shields and multiple expansion boards, the shields make prototyping with the Arduino a lot easier. A lot of people design custom shields to match their requirements. But in a raspberry pi has a very few number of shields, and a raspberry pi is a powerful device at a cheaper cost and enables easy prototyping. So I decided to design a shield to make the projects much easier for the raspbe ...

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Another (larger) Raspberry Pi Interface Board

Here is another somewhat larger interface shown connected to a switch unit and a 16 LED output board. As the Pi connector does not have 20 GPIO pins, three of the pins are shared and can be connected to be either input or output via tree links. I designed the pin-out of this interface so that most of my Velleman projects can  be connected to it without alterations. The finished product provides four input l ...

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Run HummingBoard Raspberry Pi-Like Board is Now Available for $45 and Up

HummingBoard is a board made by SolidRun that’s mechanically compatible with the Raspberry Pi, and offering the same expansions connectors, and a few extras. The board is comprised of a baseboard and a microSoM powered by Freescale i.MX6 Solo, Dual Lite or Dual. At first it looked like an internal project,  but the board went viral together with the Banana Pi, and the company has now announced availability ...

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Multitasking on Raspberry Pi using Single C Code

The Raspberry pi is a device which uses the Broadcom controller chip which is a SoC (System on Chip). This SoC has the powerful ARM11 processor which runs on 700 MHz at its core. This powerful processor and the controller having the peripherals like timers, interrupt controller, GPIO, PCM / I2S, DMA controller, I2C, SPI slave, PWM, UART, USB, graphical processing unit (GPU) which includes VideoCore, MPEG-2 ...

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Power supply for function generator

Over the course of developing and testing the function generator I have needed a dual polarity power supply.  I have been using a bench power supply that I made some time ago.  It has two variable voltage outputs and I am linking the +ve terminal of one supply to the 0V of the other supply to create a dual +/- supply.  This is fine but I also needed a way of powering the arduino uno that I am using to contr ...

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Arduino and Raspberry Pi: We need them in classrooms across the …

It is great being introduced to science and technology at a young age. Do you remember that moment you used a computer for the very first time, or the first time you played Tetris or Snake? How fascinating was that? I have fond memories of my earliest encounter with a computer, it was a 386 PC and it ran Windows 3.1. I would spend days on end fiddling with the spreadsheet software and playing Minesweeper, t ...

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Orange Pi Development Boards Are Raspberry Pi Clones

Raspberry Pi - Wikipedia, the free encyclopedia - Orange pi debian sd image | igor pečovnik, Orange pi is a raspberry pi / banana pi clone. it identifies as banana pi so almost everything what works for banana works for orange. i made one special build. Igor pečovnik, Udoo is a frescale imx6 based board with an extra arduino due’s sam3x on board. here is a list of functions that are supported. below is a kn ...

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ADC Circuit: Raspberry Pi Analog Input Circuit on Breadboard

This project shows how to construct a simple MCP3002 Analog-to-Digital Converter (ADC) circuit with a test potentiometer input. It shows how to wire the SPI pins for successful data communication between the ADC and the Raspberry Pi. Breadboard Build A breadboard, or “solderless breadboard”, is a tool, which allows engineers to rapidly prototype their circuit ideas without dedicating the components to a per ...

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