I got this launch edition 1989 Nintendo Gameboy at a yard sale for $1 and decided to restore it and clean it up. First, I needed to re-solder the battery connectors to the PCB so it would start up. Then, I cleaned out the cartridge slot so it would actually load games. The yellowing on the case was pretty gnarly, so I took it fully apart and used the hydrogen peroxide + UV light method to reverse the ageing. It worked great!
The basic chemistry of it, as detailed in the retr0bright project page, is that there was bromine added to the ABS plastic to act as a fire retardant. Over time and exposure to UV light, the bromine finds its way to the surface, lending the yellow cast. Hydrogen Peroxide, and activator, and more UV light finish the job and allow the bromine to fly free, leaving the surface of the ABS entirely.
Here you can see the front of the case after ageing for 29 years next to the back of the case after the hydrogen peroxide + sunlight for six hours treatment.
You can search for the exact method and different recipes online, but you essentially need a high-ish concentration hydrogen peroxide — here I’ve got 20 volume which is 6% concentration — and an activator such as Oxy and something to thicken it. People call this Retr0brite. It turns out that salon-grade hair “bleach” has all of the necessary ingredients rolled into one bottle.
Paint it on (after cleaning the case with water and rubbing alcohol and more water), seal it up in cling wrap, and put it in the sun for six hours.
What a difference!
Here, I’ve gotten the top half going. I didn’t leave it in the sun for as long and may give it another shot to further remove the yellowing.
I designed and built this lovely standing desk a few months ago — these are the build photos.
My materials of choice were galvanized pipe, SpeedRail and Kee Klamp connectors, four heavy-duty locking casters, and a maple butcher block top.
I use it for my computer workstation in my workshop — it’s nice to be able to roll it around when needed. It would also make for a very nice workbench or kitchen prep table.
The top is 48″ x 30″ x 1-3/4″ thick. The legs are 34-1/2″ tall, so including casters and butcher block top, it stands at 38″ high.
Here’s a quick DIY for making handbalancing canes. My daughter and I built these in an afternoon. They’re great for working on handstands, press-ups, L-sits, dips, and handbalancing tricks. We use them during aerial straps classes at Cirque School LA, so I thought it would be fun to make a set at home.
-One 2’x’2′ piece of 3/4″ plywood (we started with pine, but that was too soft) cut down to three sections
-Two 4″ lengths of 2×4 for hand blocks (I used some scrap framing pulled from our 1939 house during a renovation)
-Four 3/4″ floor flanges
-Two 18″ sections of threaded 3/4″ black pipe (you can choose 12″ for a shorter stand, and can always swap them out later)
-Twelve #10 1-1/2″ screws
-Sixteen #10 3/4″ screws
I decided I needed a Circuit Playground and Circuit Playground Express render farm. Here’s the stand I made on the CNC machine.
I designed it in Fusion 360 and then milled it with the Othermill Pro. First, I ran a pocket clearing pass.
Next, I ran a pencil pass to clear out the scooped out slots for the curvature of the boards.
These rough passes left behind a bit of material, as you can see here.
The final cleanup was a parallel pass with a fairly tight stepover, I ran it at 90 degrees from the stock, so it followed the grooves and had longer runs.
Here it is with a Circuit Playground Express nestled in it lovingly.
Here you’ll see some purple prototype boards, and the new red Circuit Playground Classic Digi-Key will be selling as part of the “buy one , give one” donation program for Girls Who Code
Here’s the full set, ready for various tutorials I’m working on with MakeCode, Arduino, and Circuit Python!