Adafruit Holiday Shipping Deadlines 2018: Attention! Please place all UPS Next Day orders by Monday 12/17/2018 11 AM EST
0

Raspberry Pi Chained Shift Registers #piday #raspberrypi @Raspberry_Pi

8747957195_109b344ede_b

From Les Orchard’s flickr:

I need to blog about this. This photo includes:

* A Raspberry Pi with a T-Cobbler
* Two 74HC595 shift registers
* A 20×4 LCD display with negative RGB backlight (currently hard-wired to purple)

Put together, this is a Raspberry Pi running a Python script that uses 3 GPIO pins to control 16 outputs.

Driving the LCD itself is a dirty, dirty hack that fools some code from Adafruit into thinking it’s talking directly to GPIO pins, when really it’s talking to my shift registers.

It’s that last part which made me bounce in my chair – because I don’t quite yet understand how to talk to the LCD display, yet my hack worked the first time. (Albeit very, very slowly.) \o/

In the near future, I want to figure out how to control the red / blue / green backlight pins from the Raspberry Pi, in order to change colors on the display

Original post here.


Featured Adafruit Products

ID1105_MED

Adafruit Pi T-Cobbler Breakout Kit for Raspberry Pi – Now that you’ve finally got your hands on a Raspberry Pi® , you’re probably itching to make some fun embedded computer projects with it. What you need is an add on prototyping Pi T-Cobbler from Adafruit, which can break out all those tasty power, GPIO, I2C and SPI pins from the 26 pin header onto a solderless breadboard. This mini kit will make “cobbling together” prototypes with the Pi super easy. Designed for Raspberry Pi Model B Revision 1 or Revision 2. (read more)


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, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, 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 9,200+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

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/


Maker Business — Japanese word working and more in December’s issue of HackSpace magazine!

Wearables — Solder-less magic

Electronics — = != ==.

Biohacking — Finding Bliss with Anandamide

Python for Microcontrollers — sysfs is dead! long live libgpiod! libgpiod for linux & Python running hardware @circuitpython @micropython @ThePSF #Python @Adafruit #Adafruit

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



1 Comment

  1. Hey, I just finished a quick proof of concept project using about 10 different adafruit products, including the T-Cobbler and wanted to show it off. (not sure this is the best place to do so, but here it is)

    http://www.youtube.com/watch?v=n6u-H1sza-w

Sorry, the comment form is closed at this time.