Author Archive: mattrob

I recently built a “Mendel90” 3D Printer!  I purchased it as a kit from the original designer.  It took about 1 week to put together and calibrate.  It now prints parts out of PLA or ABS plastics (available in various…
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I designed two sets of computer/general TV speakers using the affordable Tang Band W3-881SI from Parts Express (no longer available!). Using the parameters listed in the driver datasheet and the design equations found in “Introduction to Electroacoustics & Audio Amplifier…
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Here is a collection of photos of my Arcade Cabinet during construction. Click here for technical notes on the project.

Materials Used: “As-Is” display cabinet from local Menards store Raspberry Pi GP-Wiz40 USB Button Interface Assorted Joysticks and Buttons (from GroovyGameGear.com) Dell 19″ LCD (with DVI) Computer Speakers Power Strip Cell phone power supply (for Raspberry Pi & Speakers) Note:…
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Details about this project are documented on the K-State Electronics Design Club website. This video was submitted as part of the K-State ECE Video Contest:

I needed some simple speaker stands for my surround speakers that didn’t take up much space. After doing a quick search online, I decided to make my own! My design was mainly based on this how-to article with a few…
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I cleared up my foggy/cloudy headlights using this method. I used 800, 1500, and then 2000 grit sandpapers for the wet sanding. It worked quite well! See below for before and after pictures.