4FUN Mini tools & playful demos

Choose a tool

Quick, lightweight experiments — all open in a new tab.

Semiconductor

Implant Profile Simulator

Explore ion implantation profiles used in the silicon industry — quick intuition for depth distributions and process knobs.

ion implantation profiles process intuition
Simulation

Rock–Paper–Scissors Simulation in 2D

Particles move with constant velocity plus Brownian motion-like jitter, evolving local interactions into emergent patterns.

2D dynamics constant velocity Brownian motion emergence
Analyzer

AI Image Gradient + Frequency Inspector

Upload an image to analyze gradient covariance (PCA on Sobel gradients) and the frequency-domain power spectrum. With calibration, a tiny logistic model estimates an AI-likeness probability.

Sobel + PCA power spectrum calibration logistic model
Quantum

Quantum Lottery (YES/NO)

A playful Stern–Gerlach-inspired demo: generate random spin states, “measure” along Sy, average the probabilities, and the whole experiment collapses into one clear outcome: YES or NO.

spin-1/2 Sy projection randomness YES / NO