digiwleea: build a CPU from the transistor up

digiwleea is a free, browser-based switch-level digital logic simulator and a from-the-ground-up course. Build every logic gate from CMOS transistors, then compose them into adders, latches, registers, and a working 8-bit CPU, with an AI tutor (Wleea) to help.

Start learning:

Free tools:

idle

welcome to the lab

Build logic from the transistor up. Wire it, poke it, watch it think.

transistor → NAND → adder → memory → CPU

30+ hands-on levels. Act I is free forever, no account needed.

or just poke at a ready-made circuit:

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