Watch a digital circuit explain itself.
Narrated walk-throughs of digital logic — from a single AND gate to a working CPU. A virtual professor explains a real, interactive circuit in your language. Pause anytime and play with it yourself.
See a SimCast in motion
Press play. A virtual professor walks through a real, interactive circuit in your language — pause anytime to flip switches yourself.
There's a lesson for wherever you are.
Click any lesson to play it. The full curriculum goes from a single AND gate to a working CPU. You don't have to start at the beginning.
Just learning gates
5 lessons · all free
Boolean simplification
4 lessons · all free
Adders & arithmetic
6 lessons · 2 free
Multiplexers & decoders
5 lessons
Latches & memory cells
4 lessons
Flip-flops & clocking
5 lessons
Registers & counters
5 lessons
How a CPU actually works
5 lessons
Seven languages, all human-quality.
Every lesson has a real voice track and synced subtitles in seven languages — auto-detected from your browser. Click a tile to read this page in your language.
~12,000 voice clips across 94 lessons. Every step voiced in every language — no machine-read fallback.
21 lessons free. Pay once for the rest.
No subscription, no auto-renewal. The free lessons cover most of what an intro digital-logic class needs — try them all without signing up. Pay once if you want sequential logic and CPU lessons.
Gates, boolean simplification, first arithmetic. No card, no email.
Fundamental 47 lessons unlockedAll combinational logic — covers most intro CS curricula.
Professional 67 lessons unlockedAdds sequential logic — flip-flops, registers, counters.
Max 72 lessons unlockedMemory, control unit, full 4-bit calculator build.
One-time purchase. No recurring fee. Academic email gets 50% off automatically.
Built for students, trusted by teachers.
Real users sharing how they used SimCast lessons in class and self-study.
Hook: a CS undergrad's quote — "got me through digital logic finals" or similar. Should reference a specific lesson (D flip-flop, ALU) so it's concrete.
Hook: an instructor's quote — "I assign these as pre-lecture work" or "the embed plays right inside our LMS." Validates the teaching use case.
Hook: a self-learner's quote in a non-English language (zh / ja / es / de). Proves the multilingual claim with a real voice, not just our marketing.
The first lesson is two minutes away. Free.
No account, no card, no commitment. Press play and go.
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