The rise in cheap PCB fabrication has made old-school prototyping methods such as wire wrapping somewhat passé, but it still has its place. And if you’re going to wire wrap, you’re going to want a quick and easy way to strip that fine Kynar-insulated wire. So why not use PCB material to make this handy wire-wrapping wire stripper?
The tool that [danielrp] built is pretty simple – just a pair of razor blades held together so as to form a narrow slot to cut insulation while leaving the conductor untouched. The body of the tool is formed of two PCBs, between which the blades are sandwiched. [danielrp] designed the outline of the PCBs in DraftSight, then exported a DXF into EAGLE to make the Gerbers. The fabricated boards needed a little post-processing, including tapping the holes on one side to accept the screws that hold the tool together. We were surprised that FR4 took the threads at all, but it seems to work for this low-torque application. The disposable snap-type blades were sandwiched between the PCBs and the gap between them adjusted for nick-free stripping. The video below shows the design and build process.
We always appreciate homemade tools, and the fact that you can get a stack of PCBs for almost nothing makes us wonder what else we could use them for. We recently saw them used in a unique word clock, and even turned into a folding circuit sculpture.
[Ryzee119]’s GBA might not look so different at first glance. The screen is way better than you remember, but that may just be your memory playing tricks on you. The sound comes out of the speakers. It feels the right weight. It runs off AA batteries. Heck, even the buttons feel right.
It’s not until you notice that it really shouldn’t be playing any games without a cartridge inserted that you know something is not right in the Mushroom Kingdom. When you look inside you see the edge of a Raspberry Pi Zero instead of the card edge connector you expected.
It took a lot of work for [Ryzee119] to convert a dead, water damaged, GBA to a thriving emulation station based around a Pi Zero. The first step was desolder the components he couldn’t find anywhere else. The LR buttons, the potentiometer, and even the headphone jack. The famously hard to see screen, of course, had to go. It was replaced by a nice TFT. Also, the original speaker was too corroded from the water and he sourced a replacement.
Next he took a good photo of the GBA’s circuit board. We wonder if he used the scanner method mentioned in the comments of this article? He spent a lot of time in Dassault’s DraftSight, a 2D CAD program, outlining the board. Then, after thoroughly verifying the size of the board for the Nth time he imported the outlines to EagleCAD.
He managed to cram quite a bit onto the board while remaining inside the GBA’s original envelope. The switches, potentiometer, and jack went back to their original locations. Impressively, he made his own pad traces for the A, B, and D-Pad buttons. The mod even handles slowly decreasing battery voltages better than the original.
In the end it all snaps together nicely. He’s configured it to boot into the emulator right at start-up. If you’d like one for yourself, all his files are open source.