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Circuit Sim

Drag logic gates onto a canvas and simulate digital circuits.

Plays in browser⌨️Mouse drag and click⏱️Open-endedMedium
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Free play mode — Add gates from the palette, wire them together, and watch real-time signal propagation. Select a challenge on the left to start learning.
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0 gates · 0 wires

How to Play Circuit Sim

  1. Place components — resistors, capacitors, LEDs, switches, and batteries — onto the circuit board from the component panel.
  2. Connect components with wires by clicking a component terminal and dragging to another terminal.
  3. Power the circuit and observe current flow, voltage readings, and component behavior in real time.
  4. Adjust component values (resistance, capacitance) to achieve the target voltage or current specified by the challenge.
  5. Complete circuit challenges to unlock more advanced components and progressively complex puzzles.

About Circuit Sim

Circuit Sim is a browser-based electronics simulator that teaches basic circuit theory through interactive puzzles. Build series and parallel circuits, observe voltage and current relationships, and explore Ohm's Law in real time as you complete progressively challenging circuit design problems. The simulation accurately models how real electronic components behave, making it a genuinely educational tool alongside being a fun game.

Great for electronics beginners, engineering students, and curious minds who want to understand how circuits work without buying physical components. Every concept is introduced gradually — you'll be building multi-component circuits and understanding current dividers before you know it. No electronics background needed, and no download required to start experimenting.

Frequently Asked Questions

Do I need to know electronics to start playing Circuit Sim?
No prior knowledge is needed. The game introduces concepts progressively, starting with simple circuits and building up to more complex configurations as you gain confidence.
What components are available in Circuit Sim?
Available components include resistors, LEDs, capacitors, switches, and batteries. More advanced components are unlocked as you complete earlier circuit challenges.
Does Circuit Sim simulate AC circuits?
The core game focuses on DC circuit fundamentals like Ohm's Law, series and parallel connections, and voltage dividers. AC circuit simulation may be available in advanced challenge levels.
Is Circuit Sim based on real electronics principles?
Yes — the simulation models real-world electronics behavior including Ohm's Law, Kirchhoff's voltage and current laws, and accurate component characteristics.