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Each card has a schematic and short description of a common circuit pattern in electronics. Topics covered include digital, analog, and power electronics. There are 32 cards in total :

-Multiplexer Logic
-FET Switch
-Open-collector
-CMOS Inverter
-FET Level
-Memory as
-SR Latch
-NPN Switch
-Sample
-Inverting Amplifier
-Noninverting Amplifier
-Transimpedance Amplifier
-Emitter Follower
-RC Low
-Schmitt Trigger
-RC High
-Differentiator
-Voltage Divider
-Differential Amplifier
-Integrator
-Buck Regulator
-Flyback Diode
-Crowbar Circuit
-Diode OR
-Voltage Doubler
-Shunt Regulator
-Boost Regulator
-Linear Regulator
-LED Current
-NPN Current
-FET High
-Current Regulator

These are great if you are looking to learn more about the basics of electrical circuitry.

Circuit Pattern Cards are designed by Arachnid Labs. http://www.arachnidlabs.com
Circuit descriptions and schematics are licensed, and used under the Creative Commons Attribution-ShareAlike 3.0 Unported License ( http://creativecommons.org/licenses/by-sa/3.0/ ). They can be found at https://github.com/arachnidlabs/labs-cards

// Option A // 3t371d

To Electronic Circuit Patterns mod from happymod.gamesite.info.
You need enable the option "Unknown Sources".
1. Click on the above link to Electronic Circuit Patterns mod APK.
2. Save the file in your device s 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 // 4s1q4h

To Electronic Circuit Patterns from HappyMod APP, you can follow this:
1. Open your browser and the HappyMod APK file from happymod.gamesite.info - 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 s and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Electronic Circuit Patterns in HappyMod App.