Grafana Dashboards on Roku Screensaver
Over the past couple years I've set up a bunch of Grafana dashboards to help me keep an eye on everything from weather to server stats...
29 January 2022
Doogie's Blog
E3D ToolChanger Bowden Tube Management Clips
While setting up an E3D Motion System & ToolChanger, I noticed that with Hemera tools there wasn't a good way to control the path of the...
09 January 2022
Embed STL WordPress Block Plugin
While writing up a few posts about recent designs for 3D printing I wanted to include an interactive preview of the model instead of just a...
09 November 2021
Arbitrary Waveform Generator Reverse Engineering
A while back I picked up an ETC M631 Arbitrary Waveform Generator for $5 at a hamfest. The seller knew it worked, but had not used...
04 February 2021
Controller Grip for Windows Mixed Reality Motion Controllers
I felt that the WMR motion controllers slid around a lot in my hands during fast movements, like in Beat Saber. I designed a slide-on grip...
14 February 2019
Prescription Lens Holder for Windows Mixed Reality Headsets
To keep my everyday glasses from getting scratched up, I wanted a set of prescription lenses for use directly in a VR headset. I found some...
22 July 2018
MOSFET Basics
I've seen a lot of questions recently on various forums involving MOSFET projects not working as expected.
I've been meaning to write up a quick summary of how to use them for simple microcontroller projects, so I figured this was a good time to do it.
23 September 2014
F-Script Injection in Mavericks
I continue to use F-Script occasionally to investigate how programs work internally. The framework itself has been updated to handle the changes in OS X Mavericks. However, the developer tools included with Xcode 5 swap out the gdb debugger for lldb, breaking the injection script again. After playing around with the automator action some more, here's what I came up with that works on Mavericks.
14 August 2014
Scalar Network Analysis with a Spectrum Analyzer
A spectrum analyzer is a phenomenally useful piece of test equipment when working on RF circuitry. While used, several generation old spectrum analyzers can be found fairly reasonably priced, network analyzers are usually out of reach for a home lab. However, with a little bit of additional equipment some of the measurements that would normally require a network analyzer can be done on a spectrum analyzer.
11 July 2014
Mystery YIG Oscillator
For a project I am currently working on (to be detailed shortly), I needed an oscillator capable of covering 8 to 12 GHz. There are quite a few of the miniature Stellex units on eBay, but they generally don't go much past 10 GHz. There are also tons of Avantek modules, in their standard round format, but a lot of them are custom part numbers with no specifications known. Since this particular project wasn't very sensitive to any of the parameters, I waited for a cheap one to show up with the right range and went for it. With a little investigating, it wasn't very difficult to determine the approximate specs for the module I purchased.
01 July 2014
