In our last post, we talked about connecting a Raspberry Pi to a Crystalfontz LCD. In this post, we look at connecting an Arduino Uno with a CFA533 I2C LCD with a keypad. This gives you the ability to output and control your Arduino via I2C using a character module with a keypad interface. Let’s Get Started Step … Read more Tutorial: Connect an Arduino to a Crystalfontz 533 Keypad LCD
Have you ever been at the car wash in the late afternoon, struggling to read the instructions on the display at the pay kiosk? That may be because it was not a sunlight-readable LCD display. What Makes a Display Readable in Bright Light? There are two ways to get sunlight readability: 1) is to work … Read more What Makes an LCD Sunlight Readable?
Black blobs, “gob tops”… what are those black lumps on the back of LCDS? Let’s Take a Closer Look This image shows the detailed CAD work that goes on behind that innocuous black blob of plastic on the back of COB (Chip-On-Board) LCD modules. The engineers must analyze the wire bond length and angle to … Read more What’s Under the Black Blob on the Back of LCDs?
Here is a quick overview showing a Crystalfontz CFAL5016A-Y 50×16 Graphic OLED Module in SPI mode connected to an Arduino Uno R3. The display is connected using 3-wire SPI mode which uses 10-bit transfers. The software demonstrates bit-banged software 10-bit SPI. Video Demonstration Please note: There is banding on the OLED, which is an artifact between the OLED refresh … Read more Arduino Driving a SPI Graphic OLED
We recently had a forum customer ask for instructions on talking to our new CFA835. One of our excellent firmware designers, Mark, put together some sample code in order to do just that. I’ve created a project on GitHub to host this project Linked Here. We welcome comments, forks, and pull requests. Here’s a convenient … Read more CFA835 Communication With An Arduino