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Here's a short introductory video about the very simple and very inexpensive Max7219 LED matrix which Marlin can use to display useful information about the status of your printer in real-time.

I got two of these units recently and have been making some improvements in Marlin to support them better and add more capabilities. They're a great addition at a very low cost.

I think all the cool printers will have them one day….

ERRF2018

East Coast RepRap Festival is next weekend. I'll be doing a short keynote, talking about the history of open source hardware, the 10th anniversary of RepRap, and the challenges of maintaining Marlin Firmware. I hope to see you there!

Files

Marlin and The Matrix

Marlin Firmware includes support for the Max7219 LED Matrix, which can be used to display low level debug information, or just to draw cute pictures. This is a very brief introduction to these cool little devices and how to use them with Marlin. • Support me on Patreon! https://www.patreon.com/thinkyhead • Follow me on Twitter: • https://www.twitter.com/thinkyhead • https://www.twitter.com/MarlinFirmware • The Marlin Firmware Project: http://marlinfw.org/ • Max7219 Datasheet: https://www.digchip.com/datasheets/parts/datasheet/280/MAX7219-pdf.php • Get a Max7219 LED Matrix: https://www.google.com/search?q=max7219+matrix+for+sale • Circular (Ring) Buffer: https://en.wikipedia.org/wiki/Circular_buffer Music: "5ive By 3hree" by Thinkyhead

Comments

Anonymous

I think these are cool. :)

Kadah

The 4 long version of these matrix displays have gotten really cheap from the china suppliers, under $5 shipped. This is really cool.