Circuit Game

Build real circuits, press RUN, and see what happens. Circuit Game is a puzzle game about electronics where every board is simulated — so a circuit that works here works on a real bench, and one that fails tells you exactly why. HOW IT PLAYS • Drag parts out of the bin onto the board and wire them pin to pin. • Press RUN: the lamp lights, a resistor overheats, or nothing happens because the loop was never closed. • When a circuit fails, the coach names the fault — open loop, short circuit, LED in backwards, a part pushed past its rating — and tells you what to change. START FROM ZERO No electronics knowledge needed. The first two levels walk you through step by step, showing what to connect and where. From there the course adds one idea at a time: resistance and Ohm's law, series and parallel, switches and relays, diodes, transistors, capacitors and timing, signals and frequency, motors and transformers, three-phase power, wiring and safety. FIVE WAYS TO PLAY • Circuit Lab — build a circuit that hits the target current or voltage. • Fault Lab — the board is broken. Probe it, find the faulty part and swap it. • Meter Lab — read the circuit and work out what the meter will show. • Part Golf — make it work with fewer parts and beat par. • Thévenin — reduce a whole network to one source and one resistor, then prove it. PLENTY TO PLAY • Over 6,500 levels across five topics, plus practice rounds of five. • 2,080 quiz questions in 13 topics, from charge and current to three-phase motors. • A Daily Five: five new questions every day. • Parts to work with: resistors, LEDs, lamps, cells, capacitors, motors, switches, relays, potentiometers, diodes, Zener and Schottky diodes, NPN transistors, MOSFETs and voltmeters. EARN FOUR STARS Hit the target, stay within par, finish without the last hint, and on prediction levels call the result before you run it. STUCK? GET A HAND Three levels of hint, all free: a nudge, the spot highlighted, or one part placed for you. Show result puts the worked answer on the board for any level. LEARN FROM YOUR MISTAKES "Where you slip" counts the faults you make most and offers practice on your weak spot. MADE FOR EVERYONE • Light and dark themes • IEC or ANSI schematic symbols • Colour-blind mode, where shape and pattern carry state • Reduce motion and larger board labels • Flat or angled 3D board FREE, FAIR AND PRIVATE • Free to play — no ads and no in-app purchases • No account and no sign-in • Works fully offline • Collects no data: your progress stays on your phone

New look for every circuit, in light and dark mode. • Real 3D parts: drag a coil of wire, a battery or a resistor straight onto the board. • Every button is now a chunky 3D key that presses under your finger. • Undo, Redo, and Clear to start a board over. • Tap the goal card to see the full goal and the stars you can earn. • Level names no longer get cut off. • Fixes for small screens and dark mode.