About digiwleea
A hands-on course in how a computer is built from switches
digiwleea is a browser-based digital logic simulator, free theory reference, and guided course for learning digital logic from the ground up. Most courses teach logic gates as abstract symbols. digiwleea starts one level lower, at the transistor, the voltage-controlled switch every gate is actually made of, and builds upward: transistor to NOT to NAND to adder to flip-flop to register to ALU to a working 8-bit CPU.
Everything here is a real, simulated switch-level circuit, not an animation. The simulator settles each gate from its transistors, so when you build a NAND you are wiring actual NMOS and PMOS devices and watching the output resolve. Every diagram in these lessons is a live circuit you can open and edit in the lab.
The theory reference, interactive tools, circuit sandbox, and Act I of the guided course are free. Premium, called Closed Circuit, unlocks the full guided course and 30 AI tutor prompts a day (6× the free account allowance) through a monthly or annual subscription. The AI tutor, Wleea, can explain a concept or help build a circuit on request. The aim is simple: by the end you understand, concretely, how a computer is built out of nothing but switches.
digiwleea is built and maintained by Taceddin Sancak, an independent developer who built the simulator as a tangible way to learn how computers work at the switch level, and is sharing the result. Every lesson on this site is written and engine-verified by the same person who wrote the simulator it runs on.
Operator and contact
Taceddin Sancak · Türkiye
For support, lesson corrections, or privacy questions: digiwleea@wleeaf.dev.
digiwleea is a project from wleeaf, an independent software studio. Read the engineering blog for details of how the simulator is built, or see the terms and privacy policy.