We are big fans of the Falstad circuit simulator. Sure, it isn’t perfect, but there’s nothing else like it when you want to whip up a simple circuit. But we were blown away when we saw a more ...

This is a minimalist 4-bit CPU implemented in the infamous Paul Falstad's CircuitJS (source code ... There's a lot of potential here for more useful instructions without modifying the circuit at all.

RippleGL is a ripple tank simulation that runs in the browser. It was originally written by me, Paul Falstad, as a Java Applet. Then Iain Sharp adapted one of my other applets, a circuit simulator, to ...