Simple Circuits

How to play

Pick a piece from the box, place it on an empty square and tap it to turn it. Electricity needs a closed loop back to the battery; joining both battery ends directly is a short circuit. A closed switch completes the loop. In parallel every bulb glows at full power, in series they glow dimmer.

• 🆓 Completely free, no sign-up and no download.
• 📱 Works on phone, tablet and PC, with touch or keyboard.
• 📲 After each round, share your score on WhatsApp and challenge friends to beat it.