Monday, October 15, 2018

Switch Vomit

Luddite with random switches

Wanted to test out the plate. Used up some of the odd left over switches I had laying around.

Clicky, tactile and linear switches. The plate mount stabilizers are a tight fit, but once in place they work perfectly.

The case was recycled from a massdrop KC60. This one had plastic support fins in the center that I had to break off to make room for the Pro Micro. The cheap red case I used previously had no support fins in this area.

Close up of the broken fins. I just snapped off pieces with a pair of pliers.

Close up of the USB pigtail. You will want to make sure the plastic fins are not pinching the wires.

Wednesday, October 10, 2018

Peel-A-Way sockets at Keeb.io

Much cheaper than anywhere else.

$1 for a strip of 82 These are ultra low profile sockets on a removable strip.

I've used these type of sockets on many of my projects. They may be too short for some uses, but good to have on hand at this price.

Peel-A-Way sockets used to socket an Adafruit Feather.

Peel-A-Way socket on the top half and a regular socket on the bottom.

Peel-A-Way socket on the bottom half and a low profile socket on the top.

Mesoamerican

Keyboard pyramid

Stacked 225, 144, 81, 30, and 16 key keypads in a pyramid.
  • 225 - a 5x5x9
  • 144 - a UNQUADQUAD
  • 81 - SUDOKO, handwired 9x9 matrix.
  • 30 - a keypad I never posted before. It is built from a recycled PCB and 3mm acrylic plates.
  • 16 - a single 4x4x4x4x4
I didn't use a 5x5, It looked better with the wide base of the 5x6 keypad.




Monday, October 8, 2018

FIDO2

Next generation of U2F security keys

There are several new FIDO2 compliant security keys. These will become essential to protecting your online presence. More and more services are supporting their use in 2 factor authentication.

Solo, opensource FIDO2 project

I used the U2FZero open source project to experiment with making my own U2F key. Their second generation key will support FIDO2 and they will also have a version with NFC. You can back their project on kickstarter. These are the cheapest available, if you can wait.
https://www.kickstarter.com/projects/conorpatrick/solo-the-first-open-source-fido2-security-key-usb

Google Titan bundle

These look a lot like the Feitian U2F keys I have. But these support FIDO2. They sell it as a set of a bluetooth dongle and a NFC USB key. They recommend having 2 keys, one as a backup.

Yubico Series 5 Keys

Yubico keys can do more than U2F and FIDO2, they support additional protocols. The new Series 5 keys add FIDO2 support. There is a lower cost version that only does U2F and FIDO2.

Tuesday, October 2, 2018

Tetris

Modified 4x4 that can be stacked horizontally and vertically

You can build on the first block either to the right or down. There are headers on all sides of the PCB. You can connect the board with solder bridges or with headers and shunts.

Up to 4 can be connected together. Most of the Tetris shapes can be made, except for the big square. It runs the same firmware as the regular 4x4. Gerber files on github.

All the different ways the boards can be connected. Black square is the board with the controller. The original 4x4x4x4x4 can only be assembled as a horizontal row.

The firmware treats it as a straight 4x16 matrix regardless of layout.