Author Archives: Glen

Creating Custom 3D Printed LED Bar Graphs

While building my zombie containment unit, I decided I wanted some LED displays or bar graphs to complement the containment status video running on the smaller secondary video monitor. Some other containment units used LED air pressure gauges from eBay. … Continue reading

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Hacking Allen Bradley Cluster Pilot Lights

I was recently working on a project and wanted to incorporate one of Allen Bradley’s four-position, four-color cluster pilot lights into the project. A quick search of eBay found several lights with the lens colors I wanted but not at … Continue reading

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Driving a SparkFun 48-Segment RGB LED Bar Graph

I recently picked up a 48-segment RGB LED bar graph from SparkFun. The bar graph’s 144 LEDs are arranged in a common-anode matrix of 16 x 9 LEDs. I was hoping to drive the display with something like a Maxim … Continue reading

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Tracking People with the Googly Eyes and OpenCV

In part 1 of this series of posts, we built a giant set of robotic googly eyes. In part 2, we brought the googly eyes to life using an Arduino. In this post, we’ll use OpenCV to make the googly … Continue reading

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Bringing the Robotic Googly Eyes to Life

In part 1 of this series of posts, we built a giant set of robotic googly eyes. Now it’s time to animate them! To keep the project simple, we’ll use an Arduino Uno and a pair of Big Easy Driver … Continue reading

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Build a Pair of Robotic Googly Eyes

Build your very own pair of giant robot googly eyes! These eyes are built from laser cut acrylic panels and motorized using a pair of NEMA-14 stepper motors. This post is the first in a series of three posts. In … Continue reading

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Color Kinetics ColorBurst 6 Teardown

I’ve had three Color Kinetics ColorBurst 6 RGB LED fixtures in my front yard for about ten years now. They’ve survived numerous winter snowstorms and spring monsoons. Recently one of the three fixtures started taking on water and the blue … Continue reading

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Building an Enclosure using SketchUp and 3D Printing

The image above shows two enclosures for a printed circuit board design. These were designed using the inexpensive hobbyist version of CadSoft Eagle and the free maker version of Trimble SketchUp. The free version NetFabb Basic was used to check … Continue reading

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Folding the Six Panel Wall into a Cube

After seeing this cube and this cube, I decided it was time to build an LED cube of my own leveraging the BeagleBone Black and FPGA work I had already done for my six-panel mini video wall. The cube project … Continue reading

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Expanding the BeagleBone Black and FPGA to Drive 6 (or more) Panels

After completing my first BeagleBone Black + FPGA project and tutorial where I drove a single 32×32 RGB LED matrix, I decided it was time to go bigger. The result is the project shown below—a 3 x 2 matrix of … Continue reading

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