Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Adding ADC To The Raspberry Pi #piday #raspberrypi @Raspberry_Pi

NewImage

Adding an ADC to the Raspberry pi. via dangerousprototypes

This application note will show how to connect the RPI-Hub-Module to the Raspberry Pi and install FTDI drivers to control the module. The application note will then explain how the module may be used to read values from an external ADC device over the SPI interface.

1 Introduction
The Raspberry Pi is a single board computer (SBC) based on an ARM processor aimed at teaching young people about computers and programming. FTDI have developed an expansion module for this Raspberry Pi based on the FT2232H, the RPI-Hub-Module. This application note explains how to use the RPI-Hub- Module as an SPI master to read an external ADC. Schematics and sample code will be provided.
1.1 Overview
The Raspberry Pi is a single board computer primarily running Linux OS. The board has a number of IO ports for developing applications with, including 2 USB host ports. With the RPI-Hub-Module connected to the Raspberry Pi USB port, FTDI can demonstrate using an FTDI chipset operating on an ARM processor running Linux to expand the IO options of the Raspberry Pi while also offering buffered protection to the processor from badly connected external peripherals.

The RPI-Hub-Module is a FT2232H based design allowing for
2 independent interfaces which may be configured for GPIO, UART, FIFO, I2C or SPI etc. The module also includes a USB hub creating an additional 2 USB host ports. More information on the hub can be found here.
Figure 1.1 RPI-Hub-Module
More information on the Raspberry Pi can be found here.

1.2 Scope
This application note assumes the user has already created a working Linux image on an SD card and the Raspberry Pi is already functional.
This application note will show how to connect the RPI-Hub-Module to the Raspberry Pi and install FTDI drivers to control the module. The application note will then explain how the module may be used to read values from an external ADC device over the SPI interface.

Read more

998Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!



Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 24,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — Ornaments to the rescue

Electronics — Keep track of those rails!

Python for Microcontrollers — Python on Microcontrollers Newsletter: VSC for RasPi/Chromebook, projects and more! #Python #Adafruit #CircuitPython #ElectronicHalloween @micropython @ThePSF

Adafruit IoT Monthly — Matrix Portal, Solar Lawn Sprinkler and more!

Microsoft MakeCode — micro:bit version 2 Announced!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 10/14/2020 featuring Adafruit Grayscale 1.5″ OLED Graphic Display – STEMMA QT/Qwiic!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



1 Comment

  1. I would recommend a small RF choke, something around 22uHs in the 5V line to the ADC and opamps. Something like http://www.cs80.com/ADC22uh.jpg –Crow

Sorry, the comment form is closed at this time.