Tag Archives: arduino

32×64 Programmable LED Display Board

Posted on 2020/12/27 by rob

Background I started working on this project *3* years ago. I had the idea, worked on it a few evenings per year, and put it aside. This year has not sparked much joy. I had Christmas week off. I spent … Continue reading →

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Backslash line continuation in code comments

Posted on 2016/07/18 by rob

I spent several hours this weekend tracking down a bug that highlights something I never knew about GCC (and the Arduino IDE, which uses GCC). At first I was inclined to blame the limited Arduino IDE, but that in itself … Continue reading →

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I2C LCD Shield for Arduino – save wires!

Posted on 2015/12/22 by rob

The standard character-based display used on many Arduino projects are based on the Hitachi HD44780 chip.  They are available quite inexpensively, as little as $2.59 on eBay shipped from China for a 16×2 display.  Sizes go up to 20×4 (what … Continue reading →

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Arduino + AD9850 DDS

Posted on 2015/11/16 by rob

I’ve been playing with connecting an Arduino to an AD9850 DDS waveform generator. This is a DDS chip from Analog Devices that is capable of outputting a sine or square wave at frequencies up to 40 MHz. There are two … Continue reading →

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20×4 LCD display tips — on an Arduino Nano

Posted on 2015/08/23 by rob

Using a blog for debugging notes so I can easily refer to it. LCD displays are quite common for Arduino applications.  I have purchased a 20×4 white on blue backlit display.  Most LCD displays on Arduino are based on a … Continue reading →

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