KI7TU's Reference Page -- Projects

This page is for various projects that I've come up with that you might be interested in. I'm also including here links to the files for 3-D printed things that I've "published".

You're more than welcome to duplicate them, though I would appreciate a note saying that you've done so. E-mail it to

clark "at"

(Sorry to have to make you type in the e-mail, but it avoids spam.)

Folks letting me know that they've built something I have designed will encourage me to put up more designs.

Sewable 5mm LED Mount

I've been working on a "Flashy Santa Hat", but that's still a ways from being ready to publish. In working on that, I came up with the need to attach a standard 5mm LED package to the cloth of the Santa Hat, so I designed a mount that can be 3-D printed. You can find (and download) the necessary files at I should reiterate here that this design is intended to be printed using a flexible plastic such as NinjaFlex from Adafruit.

Projector Elevation Adjustment Disks

I go to a fair number of club meetings, and many of them have digital projectors. Most of the clubs can find better things to do with their limited funds than buying the "latest and greatest" projector, and so are using one that's typically several years old. Although nearly every one of these has some sort of elevation adjustment screw, they're usually either broken or don't go far enough. (Many times they're broken and even if they did work, they wouldn't go far enough!) So, there is usually a mad scramble to find something to prop up the projector. If the meeting place is a restaurant, often times things like jelly packets or honey packets are used, but this can lead to a sticky situation.

So, I designed what I call "Projector Elevation Adjustment Disks". There are three different hieghts, roughly 2mm, 4mm, and 8mm. They have a ridge on one side, and a groove on the other, so that they'll stack and won't slide off, and the foot of the projector will fit nicely into the one on top. I consider a set to be 2 each of the 2mm and 4mm ones, and 6 or so of the 8mm disks.

Caution: Do not use PLA to print these, as it gets soft at about 50°C (122°F) -- some projectors can get them that hot, and it's VERY easy to reach that in a parked car during the summer.

You can download the necessary files from

Flashy Morse Badge

09-Jun-2014: Inspired by those paper badges that say "Hello, my name is", I designed and built a computerized badge that sends a Morse code message on LEDs. Mine says "HELLO I AM CLARK KI7TU", with features like varying colors every time it repeats, and mesauring ambient light to adjust the brightness. You can look at a detailed description and instructions, the parts list, and the software.

This screen last updated: 10-Sep-2015

Copyright © 2014 by Clark Jones