131d ago
LEGO Machine Plays Tic-Tac-Toe Without Electronics https://hackaday.com/2026/03/16/lego-machine-plays-tic-tac-toe-without-electronics/
#ToyHacks #Lego #Mechanicalcomputing #Tictactoe
LEGO Machine Plays Tic-Tac-Toe Without Electronics

Tic-Tac-Toe is a relatively simple game, and one of the few which has effectively been solved for perfect play. The nature of the game made it possible for [Joost van Velzen] to create a LEGO machi…

Hackaday
Hackaday1d ago

LEGO Machine Plays Tic-Tac-Toe Without Electronics

https://fed.brid.gy/r/https://hackaday.com/2026/03/16/lego-machine-plays-tic-tac-toe-without-electronics/

mofosyneMay 30, 2024

Learned that the credit card checksum had a mechanical means of calculating the checksum... I can't find the machine anywhere, but it's pretty cool to see that people back in the days had a way of verifying credit card numbers without a computer

https://worldwide.espacenet.com/patent/search?q=pn%3DUS2950048A

#Mechanical #computer #computing #programming #MechanicalChecksum #RetroTech #CreditCardHistory #VintageTech #OldSchoolVerification #TechNostalgia #IngeniousDesign #TechHistory #MechanicalComputing #VerificationTech

Espacenet – search results

Espacenet: free access to millions of patent documents. Find out if your invention is unique or if other inventors have filed patent applications that are considered to be prior art.