Features
Three Ways to Play
Sparky's World for ages 8 and under, Circuit Quest for 9 to 17 and Lab Unchained for adults, each with its own look, explanations and three save slots.
Real Circuit Engine
A live simulation calculates voltage, current and temperature. Tap any pin for readings and watch bulbs glow, motors spin and parts overheat.
Wire, Flip & Solder
Build freely on a canvas, or flip a real board, route wires underneath and solder every joint. Unsoldered wires don't conduct.
Play Through History
Story chapters follow the great electronics discoveries in order, with sourced reading, dated pictures and a history page for every part.
Daily & Random Challenges
A fresh puzzle of the day, plus random challenges verified by the solver so every one can be completed. Tune difficulty, parts and board rules.
Free Lab
An open bench with every modeled part, adjustable temperature and playback speed. Experiment, measure and learn from what breaks.
Screenshots
About VoltTrial
VoltTrial is an electronics simulation game where you place real components, wire their pins, run the circuit and watch what happens. A built-in circuit engine calculates voltage, current and temperature, so every bulb, motor and buzzer reacts the way real electronics would.
Three ways to play. Choose who is playing. Sparky's World (8 and under) is a read-aloud picture world of cause-and-effect puzzles about making, moving, using and staying safe with electricity. Circuit Quest (9 to 17) has real circuit missions with stars, ranks and badges, plus a free lab with every part. Lab Unchained (18+) is the full circuit story and simulator, with every value adjustable and an Expert setting for calculation targets.
See it work. Press Run and watch electrons flow. Tap any pin for its voltage and current, open a live analysis of component temperatures, and learn why a circuit fails: open paths, shorts, reversed polarity, overheating or a missing solder joint.
From the canvas to the board. Wire freely on a canvas, or flip a physical board, route wires on the underside and solder every joint before the circuit will conduct.
History you can play. Follow the story of electronics from the Leyden jar onwards, with sourced chapters, dated pictures and the people behind each discovery.
Always something new. A puzzle of the day, solver-verified random challenges and a free lab with every modeled part: resistors, capacitors, transistors, motors and logic and timer chips.
VoltTrial models safe, low-voltage DC circuits for learning. VoltTrial runs in your browser, with nothing to install. It is an educational simulation, not an engineering design tool or a guide to mains wiring.
Learn with VoltTrial
Guides that go with VoltTrial, in course order. Each one has an interactive tool, and everything can be built in the app.
- GuideYour first circuitWhat every circuit needs, and what happens when the loop is closed, open or shorted.
- GuideOhm's lawHow voltage, current and resistance relate, with a calculator for any of the three.
- ToolPower and heatHow much energy a part turns into heat, and how to pick a resistor that can take it.
- ToolResistors in series and in parallelHow resistors add up when connected one after another or side by side, with a calculator.
- ToolReading resistor colour codesHow the coloured bands encode a resistor's value and tolerance, with an interactive resistor.
- ToolThe voltage dividerTwo resistors in series give you a fixed fraction of the supply voltage. Calculate and check it here.