iPad Screenshots


This App is designed to be an introduction to constructing and operating electronic circuits. Intuitive controls and layout make Circuit Builder the perfect App for understanding the basics of electrical and electronic circuits.

Build your own virtual circuits using any combination of electrical components.
The easy to use library of components includes batteries, switches, lamps, resistors (fixed and variable), capacitors, fuses, circuit breakers, buzzers, heaters and motors. Connect components using virtual wires to make a circuit. Put the App into operate mode to see it work. You can even use virtual multimeters to measure voltage, current and resistance.

Circuits can be viewed and built in either component or schematic view.

The component library contains the following items:

1.5V, 6V, 9V and 12V

Push-to-make, Push-to-break, On-Off, 2-position single-pole, 3-position single-pole,
3-position double-pole, Thermal and Relay

6V (5W) clear, 12V (10W) clear, 12V (20W) clear, 12V (20W) red, 12V (20W) yellow and 12V (20W) blue

10Ω (5W), 50Ω (5W), 100Ω (5W), 500Ω (5W), 1kΩ (5W), 5kΩ (5W) and 10kΩ (5W)

Variable Resistors
10Ω, 25Ω, 50Ω, 100Ω, 1kΩ and 10kΩ

500μF, 1mF, 5mF, 50mF, 100mF, 500mF and 1F

0.5A, 1A, 1.5A, 2A, 3A, 4A, 5A, 7.5A and 10A

Circuit Breakers
0.5A, 1A, 5A and 10A

6V Buzzer, 24V Heater (200W) and a 12V Motor (15W)

*Maximum of four batteries and one capacitor per construction.

What’s New

Version 1.4

Compatibility fixes for iOS 10.3

Ratings and Reviews

3.4 out of 5
5 Ratings
5 Ratings
Boin' ,

Just missing one small thing

This is a great app but I fell it needs one more thing: transformers. I want to make a certain circuit but it needs a transformer. That’s the only one thing I would change

BaseballGuy135 ,


If you are stuck on circuits and you need help, this is the app for you. This app is very helpful and it is very easy to use. I recommend to everyone who is dealing with difficulties on circuits. This is a great app!!!

PonyBoyDrummer ,

Good try but needs things!!!!! Please add!!!!

Would be great but it needs more components, desperately needs LEDs, transistors, and diodes!!! Please add them, I can't recommend this to students with out more functions or components especially at this price point.


LJ Create Ltd
34.4 MB
Requires iOS 6.0 or later. Compatible with iPad.
English, German
Age Rating
Rated 4+
© LJ Create Ltd


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