New Project! Mini Commodore PET with LED Matrix #3DPrinting

In this tutorial, you’ll learn how to build and assemble a mini replica of the PET commodore. This isn’t necessarily useful or an actual computer, it’s just a cool prop. You will however, hopefully gain some experience, learn something new and have fun 🙂 There’s 144 LEDs in the Adafruit 16×9 charlieplexed matrix. It’s a classic LED matrix look that uses the IS31FL3731 chipset and can PWM each individual LED in a 16×9 grid so you can have beautiful LED lighting effects.

Tutoral on the Adafruit Learning System.

For a full list of parts, circuit diagram, code and files, check out the tutorial on the Adafruit Learning System.

Code written by Phillip Burgess @PaintYourDragon

// Animated Commodore PET plaything. Uses the following parts:
// – Feather M0 microcontroller (adafruit.com/products/2772)
// – 9×16 CharliePlex matrix (2972 is green, other colors avail.)
// – Optional LiPoly battery (1578) and power switch (805)

Taking a cue from our animated flame pendant project, this code addresses the CharliePlex driver chip directly to achieve smooth full-screen animation. If you’re new to graphics programming, download the Adafruit_IS31FL3731 and Adafruit_GFX libraries, with examples for drawing pixels, lines, etc.

Animation cycles between different effects: typing code, Conway’s Game of Life, The Matrix effect, and a blank screen w/blinking cursor (shown for a few seconds before each of the other effects; to imply “loading”).


Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!

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

Join over 38,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

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


New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 11/15/2024 Featuring Adafruit bq25185 USB / DC / Solar Charger with 3.3V Buck Board! (Video)

Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

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

Adafruit IoT Monthly — The 2024 Recap Issue!

Maker Business – Adafruit Daily — Apple to build another chip at TSMC Arizona

Electronics – Adafruit Daily — SMT Tip – Stop moving around!

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


No Comments

No comments yet.

Sorry, the comment form is closed at this time.