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

Build your first working circuit

Light a lamp, control it with a transistor, then try a two-switch lamp. Start with one connection.

Light a lampOne wire · about 2 min
Control it with a transistorA switch you build · about 5 min
Try a two-switch lampA small design challenge · about 5 min

Act I is free. No account needed.

Try an example circuit

or just poke at a ready-made circuit:

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