Tutorial
How to Load Custom Firmware on a CFA735 or CFA835
Want to run custom firmware on a CFA735 or CFA835? You’re in luck! This tutorial will help you hack a CFA735/CFA835.
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Help! I have garbage showing on my 16×2 LCD
Have you ever tried to bring up a display only to have it show you something like this? What are some common problems with LCDs showing garbage? If it is a new design or a prototype using a common HD44780 style LCD, then it is almost certainly wiring or code. Troubleshooting Wiring Problems: Ask someone
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Bringing Up Your Crystalfontz Display
Whether it is a ‘traditional’ USB display, or one of our TFT, OLED, or ePaper modules, we understand that bringing up displays can be a complicated process. We are here to help and we do everything we can think of to make it an easy-to-understand and painless process so you can be up and running in
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Crystalfontz In the Wild: Solar-Powered WiFi ePaper
Check out this developer’s innovative use of the Crystalfontz 128×296 3-color ePaper display — a solar-powered WiFi ePaper setup. Developer Frank Buss provides a detailed write up of his project on his HackADay post. From his post: “The amazing thing about ePapers is that the image lasts without power forever (I tested it for months), and the contrast is
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Crystalfontz in the movies? Well, almost!
Jason Eppink of the Museum of the Moving Image in Astoria New York has been working on a great little project that shows subtitles on an external Crystalfontz LCD, while the video plays on a monitor above. The project is open source on GitHub. Project Details It uses a Raspberry Pi to play the videos.
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FAQ: Why does the initialization code for a 20×4 LCD specify 2-line mode?
When working with a 20×4 character LCD, you might be surprised to see the controller set to 2-line mode: Write_To_LCD(COMMAND,0x38); //SET 2 LINE,5*8 FONT Why would a 4-line LCD’s controller be set to 2-line mode? It has to do with the way the LCD glass is laid out. Essentially the display is the right and
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FAQ: LCDs for Servers
Question from our tech forum: I’m looking to put LCDs on my new servers, which are pretty significantly complex even before you get into the software on them. This customer had a complex set of requirements for LCDs to be used in a server set up. Summary: Need to drive four LEDs, and need 14
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Not So FAQ: Can you use 30 temperature sensors, 200 feet from the PC ?
Here is a not-so-common customer question: Is it possible to measure server temperatures using 30 different sensors, 200 feet away from the computer? Answer: Yes, this possible! Our WRDOWY17 temperature sensor is a natural choice for this type of application. The Crystalfontz 16×2 character LCD with keypad gives an easy serial or USB interface to 32 WRDOWY17 sensors.
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FAQ: How Do I Code For A Crystalfontz LCD?
Our tech support team is often asked for information about “how to code an LCD.” In other words, how do I get started (and what is the best choice) of an LCD module for my project? Answer: The Crystalfontz Advanced LCD Modules are the quickest and easiest way to power up and run your LCD. These
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Tutorial: Driving a 144×32 Graphic LCD
We have published a sample Arduino Sketch that shows how to drive a Sitronix ST7920 based CFAG14432D 144×32 Graphic LCD in our support forum. With just a few primitive functions, you can create some nice looking displays. We used a Seeeduino v4.2. An Arduino Uno would work just as well. Here is a video overview of
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LCD Glossary
Wondering how LCDs are constructed? How liquid crystals create an image? Or how backlights arranged for best viewing? What about different types of connections (SPI and I2C) and ways to drive LCD displays? So many questions. We have answers — check out the new Crystalfontz LCD Glossary. Growing Glossary of LCD Terminology and Acronyms This glossary will
