I finally made it: an XOR mechanism that requires exactly one of two keys to be inserted at a time. I call it the 🗝️ #keyguardian.

This is very useful for example to track where important small things go: Want to take the car keys? You have to insert your name tag to unlock it.

My first mechanical project with #SolveSpace and it was great!

EDIT: Now on #Printables: https://www.printables.com/model/793767-keyguardian-dual-key-xor-mechanism

#3dPrinting #CAD #3dDesign #Screwiverse #HSW

Keyguardian: dual-key XOR mechanism by Yann Büchau | Download free STL model | Printables.com

A HSW key holder that releases one key only when a nametag is inserted | Download free 3D printable STL models

Printables.com
@nobodyinperson you fool! If you make a physical XOR mechanism, that's dangerously close to making a logic gate. What if someone prints 12 million of these and builds adders and ALUs and memory and now it's running doom!
@foone @nobodyinperson or maybe print just a dozen of them and use it for train control 😊

@djasa

Now, don't be giving british rail upgrade ideas...