Everything students and teachers need to build, simulate, and learn electronics — from simple LED circuits to complex analog designs.
Build combinational and sequential logic circuits with a drag-and-drop interface. Open Circuits includes all standard logic gates: AND, OR, NOT, NAND, NOR, XOR, XNOR, and buffers. Connect gates with wires, add input switches and output LEDs, and watch your circuit simulate in real time.
Our analog engine uses Modified Nodal Analysis (MNA) — the same mathematical approach used by professional SPICE simulators — to calculate node voltages and branch currents in real time. See voltage and current values update instantly as you adjust component values or toggle switches.
Teachers can record step-by-step circuit building tutorials with audio narration. Every action — placing a component, drawing a wire, changing a value — is captured and can be replayed by students directly on the canvas. Students don't just watch a video; they interact with the actual circuit as it's being built.
Create class groups, invite students by email, and assign circuit-building challenges. Set deadlines, review student submissions, and provide feedback — all within the platform. No more collecting screenshots or grading circuits by hand.
Explore a curated library of published circuit designs organized by category. Find reference implementations of common circuits like voltage dividers, half adders, SR latches, LED drivers, and amplifier stages. Fork any circuit to your personal workspace to modify and experiment with it.
The Open Circuits editor is built for speed and precision. Place components on a snap-to-grid canvas, draw wires with automatic routing, and use keyboard shortcuts for rapid circuit building. Supports undo/redo, copy/paste, multi-select, rotation, and zoom.
No credit card. No installation. Start building circuits in seconds.