In this video, I play around with some COB LED Panels: Purpose Looking into adding some workshop lighting, I evaluated three kinds of COB LED Panels. This is the first part in a series on COB LED lighting. Once I’ve identified the properties of the panels and figured out how much current I can safely …
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Resistive Load, Constant-Current Power Supplies, and a 3D Printed Desk Lamp
In this video, I build a 3D Printed Desk lamp. The basic design came from Thingiverse, but I repurposed my LM2576 Constant-Current design to serve as a dimmer. Motivation It all started when I found an interesting lamp on thingiverse, https://www.thingiverse.com/thing:3328807, which used used 75mm air hose segments from another model, https://www.thingiverse.com/thing:3283786/, to make a …
Read More3D Printer OctoPrint Monitoring with Prometheus and Grafana
I wrote a Prometheus plugin for OctoPrint Purpose After doing the environmental monitoring project, I wanted an easy way to be able to correlate environmental changes with 3D printing. I also wanted a way to keep track of my prints, amount of filament used, etc. I wanted the ability to drill down on specific days …
Read MoreRaspberry pi based indoor air quality monitor
In this video, I build an indoor (and outdoor?) air quality monitor: Motivation For years I’ve followed the “uRadMonitor”, a device that does air quality monitoring and radiation monitoring. I’ve played with geiger counter projects before and frankly found them to be not very interesting. However, the idea of monitoring air quality is something that …
Read MoreBuilding the ultimate USB power distribution system
In this video I build a power distribution system for my workbench: Purpose I’ve started to accumulate many devices and tools that use 5V power sources, typically a USB-style cable with either a micro-usb plug or a barrel plug at the other end. In addition to my typical chargeable handheld devices like my iphone and …
Read MoreMaking the e-paper equivalent of an Etch-a-Sketch
In this video I review some Waveshare and Gooddisplay e-paper displays, and build an e-paper equivalent of an Etch-a-Sketch Introduction to e-Paper displays e-Paper (aka e-ink) displays are a fascinating new technology that most people will be most familiar with from the proliferation of Kindle and similar reading displays. The unique property of the e-paper …
Read MoreYet Another Masterplay Clone
The Masterplay was originally a device that allowed Atari 2600 digital joysticks to be used with the Atari 5200. In this post, I describe a masterplay clone that I created. Purpose / Introduction The analog controllers for the Atari 5200 are (in)famous for their poor feel and performance. The analog stick, while a really good …
Read MoreAtari 5200 Playstation 2 Dual-shock controller adapter
I already built a nifty handheld controller, and I should be enjoying my retro gaming experiences, but I couldn’t help building something new, so here is a PS2-to-Atari5200 adapter: Purpose This adapter allows you to use a PS2 controller on an Atari 5200 gaming console. The 5200 was notable at the time for its use …
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