"Circuit Calculator" is a professional electronics design tool for engineers.
180+ circuits for design, 70+ electronics calculators, 20+ Application Notes, Logic Solver.
Convenience, visibility and ability to find an optimal solution in minimum time.
Simple user interface, small size, smart tool.

*** No ads, No Internet access required. ***

This electronics design tool is designed by an engineer for engineers and is able to save you a lot of time!

Are you afraid to buy this app because of the lack of reviews?
People are lazy to write reviews and the tool does not force you to write it like others do.
The app has been on the market for several years.
If someone who bought the tool was angry, they would write about it in the comments!
And of course, if you find time to rate or write a review on this app, it will help other people to make their choice.

You can try "Circuit Calculator Demo" before you buy:
https://play.google.com/store/apps/details?id=com.vdv.circuitcalculator.demo

This electronics design tool can compute:
* Amplifiers:
Inverting, Non-Inverting, Difference, Instrumentation and etc.
With Op Amps and Fully Differential Amplifiers.

* Variable Gain Amplifiers:
Single-ended and Differential.

* Drivers:
Single-ended, Differential, Balanced.

* Mathematical Operations:
Summing, Range converting, Integrators and etc.

* Current Sources and Receivers:
Current-to-Voltage and Voltage-to-Current converters.

* Impedance Converters:
Gyrators, C to L and C to RL.

* Active and Passive Filters: Low-pass, High-pass, Band-pass, Band-stop, All-pass.
LC, Diplexer, Triplexer, Multiple Feedback, Sallen-Key and other topologies.

* Impedance Matching:
L-network, PI-network, T-network.

* Power Circuits:
Feedback resistor divider, Zener diode, Input and Output Filters, Voltage multiplier.

* Switching-Mode Power Supply Stages.
- Small-signal analysis;
- Current and voltage waveforms of components;
Buck, Boost, Inverting Buck-Boost,
SEPIC, Cuk, ZETA,
Flyback, Forward,
Half-Bridge, Push-Pull, Full-Bridge.

* Control Loop Compensation:
Type I, Type II, Type III
with Op Amp, Transconductance Amp, Shunt Regulator (TL431) with optocoupler.

* Others Passive and Active Circuits;

Features of the tool:
* Tuning;

* Monte-Carlo worst-case analysis;

* Reverse: calculation of circuit parameters at known values of its components if it is possible.
Suitable for circuit verification and reverse engineering.

"Circuit Calculator" also includes:
* Logic Solver, from 2 to 6 inputs.

* Electronics toolbox with more than 50 calculators.
Parallel/Series connection, LED resistor, Noise calculations, PCB trace temperature, PCB trace impedance, Planar inductors, and etc.

* Application Notes with information about components, circuits, standards.

* S-Parameters Viewer which supports s1p, s2p, s3p, s4p files with S-parameters

* Gerber Viewer which supports basic commands only

You can use "Filter Designer" to design multistage active analog filters, available in the Google Play Store.
https://play.google.com/store/apps/details?id=com.vdv.filterdesigner

Let's Make Electronics Easier!

// Option A //

To download Circuit Calculator mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Circuit Calculator mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Circuit Calculator from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Circuit Calculator in HappyMod App.