This design was triggered by a project presented on the French maker site www.fabriqueurs.com, where an Arduino ATmega board and an Ethernet shield were used to build a scrolling text display.
We decided to build Pascal’s prototype in the Elektor Lab, but when we ordered the MAX72xx-based LED matrix modules we fell into the trap he already warned us about: there are many different makes of these modules available, the most important difference being the orientation of the dot matrix. In most cases, when you buy the modules in a (web)shop, it is hard to tell (if not: impossible to know) exactly what displays you are buying. When we put ‘our’ displays on Pascal’s PCB, the text was scrolling from top to bottom on the first display, continuing at the top of the second 8 x 8 block and so on. Quite entertaining, but not exactly the effect we had in mind. Definitely not the same modules Pascal used, although they looked exactly the same on pictures we saw. Our modules are marked ‘FC-16’on the silkscreen and this appeared to be a common type of display.
More details here: www.elektormagazine.com/labs/scrolling-text-display-160491
elektron Now in Elektor: Scrolling Text Display | |
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| Science & Technology | Upload TimePublished on 21 Mar 2018 |
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