YOUR NEXT DISCOVERY

Circuit Wizards: Electronics, Sensors and Smart Devices

Explore electronics, sensors and smart devices. Build ideas that work.

Complete the Course to Earn a Certificate and Join the Hall of Fame

A welcoming electronics workbench with a glowing lamp project, tools and a miniature greenhouse. An invitation to invent; not a wiring instruction.
A sketchbook, prototype board and finished room sensor show the journey from an idea to a useful device. Decorative scene, not a build diagram.

A CLOSER LOOK

First Spark

Make useful things. Understand why they work. Find what went wrong and improve your design.

See it. Try it. Make it yours.

  1. First Spark

  2. Circuit Detective

  3. Code Meets Circuits

Absolute beginner, ages 12+. Simple English; reading support welcome. · What to know before you start

Bring with you: Read short English sentences with help if needed. Count and compare whole numbers. Add, subtract, multiply and divide small numbers; a calculator is welcome. No electronics or coding knowledge is assumed.

Make useful things. Understand why they work. Find what went wrong and improve your design.

Start with a small lamp. Learn to explain, measure, build, code and repair low-voltage electronic devices. On-screen tasks check your decisions and reasoning. Hands-on builds need the listed equipment and a practical review; the app cannot inspect your real wiring or certify physical work.

By the end, you can…

  • Read, build and measure simple low-voltage circuits. Find why a lamp will not light.
  • Use resistors, capacitors, transistors and logic to make a circuit respond to its surroundings.
  • Write and explain small programs that read inputs, control outputs and respond without freezing.
  • Read sensor data, check its quality, connect modules and control a small physical system.
  • Connect a device, handle missing data and lost networks, and plan dependable low-power operation.
  • Plan an original device, design its board, test it and explain the evidence that it meets its goal.

For another Course

  • Mains wiring, opening power adapters, high-voltage work and homemade lithium-battery charging circuits.
  • Advanced radio-frequency design, high-speed multilayer boards, advanced control theory and professional electrical certification.
  • Automatic execution of learner code or automatic grading of real hardware. Code is inspected through bounded native tasks; practical work uses an external editor, real tools and explicit review.
  • Equipment purchases, PCB orders and internet accounts are separate learner decisions. No paid cloud service is required for the core route.

YOUR LEARNING PATH

One idea leads to the next.

View Course Map →
Unit 1

First Spark

Read, build and measure simple low-voltage circuits. Find why a lamp will not light.

  1. Mission 1 of 97Your first invention starts hereChoose a suitable work setup and put a safe build sequence in order.Up next
  2. Mission 2 of 97The lamp needs a way backTrace a new lamp circuit and locate the gap that prevents it working.Up next
  3. Mission 3 of 97A tiny gap with a big jobPredict which lamps change when a switch opens in a new arrangement.Up next
  4. Mission 4 of 97Why is the wire wearing a coat?Choose materials for the inside and outside of a test lead and explain a failed contact.Up next
  5. Mission 5 of 97Hidden paths under the holesUse a supplied breadboard map to place two leads without accidentally joining them.Up next
  6. Mission 6 of 97Compare two pointsChoose the two measurement points and interpret positive and negative readings.Up next
  7. Mission 7 of 97How much charge passes?Select a safe current-measurement connection and distinguish current from voltage.Up next
  8. Mission 8 of 97Make the flow smallerPredict how replacing a resistor changes current at the same supply voltage.Up next
  9. Mission 9 of 97Small numbers without the muddleConvert given volts, milliamperes and kilohms before comparing measurements.Up next
  10. Mission 10 of 97Predict the current before you buildCalculate a resistor value for a new voltage and current requirement.Up next
  11. Mission 11 of 97Let the little light liveChoose an LED resistor from supplied part data and check the resulting current.Up next
  12. Mission 12 of 97Read a circuit like a mapTranslate a new schematic into a connection list without relying on physical positions.Up next
  13. Mission 13 of 97One path all the way roundFind current and voltage drops in a two-resistor series circuit.Up next
  14. Mission 14 of 97Give the current a choiceCalculate branch currents and predict the effect of opening one branch.Up next
  15. Mission 15 of 97Where does the energy go?Calculate resistor power and select a suitable rating with margin.Up next
  16. Mission 16 of 97Make your first light panelRepair a supplied light-panel design, calculate its resistor and choose useful tests.Up next
Unit 2

Circuit Detective

Use resistors, capacitors, transistors and logic to make a circuit respond to its surroundings.

Unit 3

Code Meets Circuits

Write and explain small programs that read inputs, control outputs and respond without freezing.

Unit 4

Sense, Decide, Act

Read sensor data, check its quality, connect modules and control a small physical system.

Unit 5

Smart Devices That Last

Connect a device, handle missing data and lost networks, and plan dependable low-power operation.

Unit 6

Inventor’s Studio

Plan an original device, design its board, test it and explain the evidence that it meets its goal.

A Debsie Course · Absolute beginner, ages 12+. Simple English; reading support welcome.