Author Archives: Jeremy Cook

A Powerful Rare Earth Refrigerator Magnet


Recently I purchased some bumper stickers from Sticker Mule to use and give away at a couple upcoming Maker Faires. Though I’m extremely happy with how they turned out and how fast they got here, I decided later that I wanted these in magnet form. Though normal refrigerator magnets are OK, they really don’t stick as well as perhaps they should, and I decided to make my own with my CNC router and Neodymium magnets that I had left over from another project. The results can be seen below:

As mentioned early in the video, I meant to have the magnets stick out of the back of the assembly, but ended up covering them up with a sticker instead. This left some indentions in the sticker, but it still sticks to a surface quite well. I shouldn’t have made that mistake, but when designing in 2D, a part has to by absolutely symmetrical about one axis if you’re going to flip it and expect it to work.

Obviously this is quite a simple build, and one that could be done manually if needed. I tried to highlight the CNC process with some interesting views in the video, stationing a GoPro camera inside the machine itself. Hopefully you enjoy!

World Maker Faire

If you’d like to see this device in person, I’ll be at the Wold Maker Faire in New York this weekend, and plan to have at least one of these attached to my backpack. If you see it, please say “hello” – I’d love to meet you!

Sticker Source

On another note, I purchased the bumper stickers used here from “Sticker Mule.” I was extremely pleased with the quality of the stickers, and how fast they shipped them to me. If you’re interested in getting your own custom stickers, use this link to get a $10 credit for both you and me!

Lights! Coasters! Drinks!

img_5638-ce-logoIf you’re been following along here, or especially on the “Jeremy Cook’s Projects” YouTube page, you might have noticed that I’m on a bit of a lighting kick. This started with my infinity mirror (which was fun, and I have more plans for it), but then morphed into a few other projects involving non-programmable LED strips.

I purchased a reel of this type of strip (Amazon) several weeks ago, and after coming back to them found that they were really excellent. You can cut them into sections of lights in multiples of three, and they have adhesive on the back, so you simply place them where they are needed and they stay. Another interesting “feature” is that even though they nominally require 12 volts to operate, they work quite nicely with a 9 volt battery.

The Infinity Coaster

Incidentally, a 9 volt battery fits inside a piece of 2×4 cut out with a hole saw along with a microswitch. I had this, along with pieces of one-way mirror in my garage, so after some creative fixturing and woodworking, I had what I call an “infinity coaster.” When you set a drink on it, it engages the microswitch, completing the circuit and giving the illusion of lights stretching to infinity inside of it. As shown in the video, it looks nice, though a coaster over 1 1/2 inches thick still has some room for improvement.

A Translucent Light Up Coaster

I’m not exactly sure when inspiration for this hit, but after Read more »

A Programmable RGB LED Infinity Mirror

Infinity Mirror with top

I’m incredibly happy with how this photo turned out!

An infinity mirror is a one-way mirror setup where the light inside of these mirrors allows you to see in, while reflecting back and forth, appearing to multiply and stretch to “Infinity”

At some point in the last few years I decided to make one of these setups, but after buying some of the parts, this project just kind of sat there waiting to be made. A few years later, now with access to a router that let me easily put 1/8 inch slots to hold the mirrors in strips of wood, I finally made it. Besides an 1/8 inch bit for my router and the one-way mirrors over a year ago, I don’t think I bout any parts for this contraption.

You’ve likely seen this kind of “infinity mirror” effect at a gym or anywhere where you stand between two mirrors. Or, as I ramblingly put it in my “howto” video below, this kind of thing was also seen in the movie Enter the Dragon. It really is an excellent movie, and though I do appreciate cheesy Kung Fu movies for their comedic value and obvious influence on later video games, such as Mortal Kombat and Tekken, that one really stands out as an entertaining movie comedy value aside.

Infinity Mirror Build Details

As for the build, it stands at 15″ high and 7″ wide. It’s made out of furring strips that I had left over from another project. They are about 2 1/2 inches wide, just big enough for Read more »