Observe
Rotate the board, identify the components and follow their connections on the schematic.
Available on iPhone and iPad
ELECTRONICS. INVESTIGATION. CREATION.
One fault.
A trail of clues.
Your move.
Step inside a 3D electronics workshop. Find what’s wrong, understand why… then build circuits of your own.
€7.99 in France · One purchase. The whole game.
CIRCUIT DETECTIVEActual gameplay
01 — 73
One circuit. Several suspects. Let the measurements guide you.
73missions to build your skills
4instruments to explore
∞ideas to put to the test
Play offline. No account needed.
WATCH. UNDERSTAND. TRY.
An idea.
A circuit that lights up.
Step into the workshop, place the components and light your first LED. Then change the resistor: the current drops. A small experiment. A real discovery.
REAL GAMEPLAYRecorded in the iPad simulator
Explore the demonstration
Open the videoActual game interface · Session recorded in the simulator · No audio
Read the demonstration transcript
The open-ended workshop offers a 3D workbench with the board and instruments. You can explore it from different angles.
On the breadboard, the sequence places a wire, a 330 Ω resistor, an LED and a return wire. Switching on the 5 V supply lights the LED. Replacing the resistor with 1 kΩ reduces the current, which is reflected in the circuit diagnostics.
YOU DON’T HAVE TO KNOW IT ALL TO BEGIN
A clear objective.
The tools to get there.
Finding the answer is only part of the pleasure. Understanding why your circuit works is the real reward.
Find a clue
Open a lesson or datasheet, read a resistor’s colour bands, or take a measurement.
Try it out
Choose a component, test your idea and see what changes. Keep exploring in your own workshop.
On iPhone, landscape gives your circuit more room. On iPad, spread out on the larger workbench.
FOLLOW YOUR CURIOSITY
Cases to solve.
A workshop of your own.
Follow a mission, or follow an idea. Choose your way to play.
01 / OBSERVE · MEASURE · DEDUCE
The answer is in the circuit.
An LED that won’t light. An unexpected voltage. A signal that has changed. Examine the board from every angle and use measurements to narrow down the suspects.
- 72 progressive missions and an optional soldering challenge
- From resistors and LEDs to diodes, capacitors and transistors
- Hints when you need a nudge in the right direction
02 / EXPLORE · EXPERIMENT
Your workbench. Your pace.
Settle into your workshop. Get hands-on with the instruments, explore circuits and practise diagnosis and repair. Take the time to understand what’s happening.
- A 3D workbench to explore with your fingertips
- Multimeter, oscilloscope, generator and adjustable power supply
- Components to replace and circuits to test
03 / IMAGINE · BUILD · TEST
What if you built it yourself?
Place components on the breadboard, connect the wires and switch on the power. Change your circuit and watch how its behaviour changes.
- Editable examples to get you started
- Wires, resistors, LEDs, diodes, capacitors and switches
- Your circuits saved on your device
YOUR FIRST LIGHTBULB MOMENT
This LED needs
the right resistor.
The battery supplies 3 V. The LED uses 2 V and needs a current of 10 mA. Which resistor will light it at the intended current?
Need a hint?
There is 1 V across the resistor: 3 V − 2 V. Ohm’s law gives R = V ÷ I. Remember to convert 10 mA to 0.01 A.
This small experiment illustrates the idea. In the game, you handle the circuits, consult datasheets and take your own measurements.
INTERACTIVE MINI CHALLENGE · INSPIRED BY LEVEL 1
Target current 10 mALED max. 20 mA
Make your choice.
Select a value to see what changes in the circuit.
THE RIGHT TOOLS, WHEN YOU NEED THEM
Less guesswork.
More understanding.
A measurement becomes a clue. A datasheet explains what you see. Reason your way forward, one discovery at a time.
Multimeter
Measure voltage, current, resistance and continuity.
Two-channel oscilloscope
Compare input and output, and follow changes in the signal.
Function generator
Change the signal and observe how the circuit responds.
Adjustable power supply
Explore voltage and current limiting.
See what your eyes alone cannot.
A little help. A real understanding.
Lessons, datasheets, hints and a calculator with π and 1/x keep the information you need within reach.
ONE PURCHASE. THE WHOLE GAME.
An electronics workshop.
In your pocket.
All missions and the open-ended workshop in one purchase. Explore on iPhone, or spread out on the bigger screen of your iPad.
No subscription. No ads. No in-app purchases.
7.99€
Price in France · one-time purchase
- All 73 missions and the open-ended workshop
- Instruments, lessons and datasheets
- Build circuits of your own
- The game in English and French
Available now for iPhone and iPad. Check the App Store for pricing in your region.
iPhone and iPad · iOS / iPadOS 26 or laterPlay offline. No account needed.
BEFORE YOU STEP INSIDE
Good questions.
Do I need to know electronics already?
You start with resistors, LEDs and your first measurements. Lessons, datasheets and hints help along the way. Later missions gradually require more reasoning and calculation.
How are missions different from the workshop?
Missions give you a specific objective and unlock as you progress. Your workshop lets you explore the tools, practise and build your own circuits on a virtual breadboard.
What does the purchase include?
The full game: all 73 missions, the workshop, instruments, lessons, datasheets and calculator. No in-app purchase or subscription is required to unlock these features. The price in France is €7.99; check the App Store for pricing in your region.
Do I need equipment or an internet connection?
No physical electronics equipment is needed. After downloading, the game works offline without an account. It is an educational simulation: components and measurements are modelled for learning.
Which devices are supported?
Circuit Detective is designed for iPhone and iPad running iOS 26 or iPadOS 26 or later. The game is available in English and French.
Does my progress sync between devices?
Progress, settings and circuits are stored locally. Progress does not sync between devices. If you run into a problem, contact support before deleting the app.