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CircuitLab | Electronics Workbench & Circuit Calculators – Android App Template

CircuitLab is a high-performance Native Android software constructed for electronics engineers,
{hardware} fans, makers, and STEM college students. Engineered with battle-tested Java and responsive
XML layouts, this app delivers a clean, extremely tactile darkish workbench interface for speedy circuit design,
interactive part decoding, and engineering calculations—functioning fully offline.

Whether or not you’re creating an engineering utility, a maker companion instrument, or a monetized instructional app, CircuitLab
gives a smooth interface and strong capabilities to carry your concepts to life on the Google Play Retailer.

Core Engine & Structure

  • 100% Native Java & XML ViewBinding: Constructed with customary Android structure, zero heavy
    cross-platform overhead, lightning-fast compilation, and excessive battery effectivity.
  • Goal SDK 36 (Android 16): Totally compliant with fashionable Google Play Retailer API degree
    necessities, using edge-to-edge system insets and supporting gadgets right down to Android 7.0 (minSdk 24).
  • Room SQLite Database: Dependable offline storage for calculation historical past with non-destructive
    migration structure and JSON backup/restore capabilities in Settings.
  • Safe Configuration: Zero hardcoded API keys; all AdMob IDs and credentials are secure and
    injected at compile time through native.properties.
  • Multi-Language Localization: Totally translated into 6 main languages: English (US), Indonesian,
    Spanish, Japanese, German, and French.
  • R8 / ProGuard Optimized: Pre-configured maintain guidelines with code shrinking and useful resource
    optimization enabled for minimal launch APK/AAB measurement.

App Options for Customers

  • Interactive Resistor Colour Decoder: Immediate visible resistance calculation throughout 4-band,
    5-band, and 6-band resistors with tolerance ranges and TCR temperature coefficient.
  • Devoted Workshop Reference Instruments:
    • SMD Part Code Decoder: Multi-mode decoder overlaying 3-digit EIA resistors, 4-digit
      EIA resistors, EIA-96 1% precision resistor codes, ceramic & tantalum capacitor codes, inductors, and
      diode/transistor package deal markings.
    • Wire Gauge (AWG) & E-Collection Tables: Full American Wire Gauge (AWG 0000 to 40)
      specs with diameter (mm/in), cross-sectional space (mm²/kcmil), resistance (Ω/km,
      Ω/kft), and secure ampacity, alongside worldwide E-Collection most popular values (E6, E12, E24, E48,
      E96, E192).
  • 12 Complete Electronics Calculators:
    • Ohm’s Regulation & Energy (Free): 4-way solver for Voltage (V), Present (I), Resistance®,
      and Energy dissipation (P).
    • RC Filter Cutoff (Free): Low-pass and Excessive-pass frequency cutoff (fc) and time fixed
      (τ).
    • LED Present Limiting (Free): Beneficial customary collection resistance and minimal wattage
      score.
    • Voltage Divider (Free): Twin-resistor divider with output voltage, divider present, and
      load impact.
    • Battery Life Estimator (Free): Run time in hours and days primarily based on battery capability
      (mAh), system load (mA), and discharge effectivity.
    • LC Resonant Filter (PRO): Resonant frequency (f0), reactance, and attribute
      impedance (Z).
    • IC 555 Timer (PRO): Frequency, obligation cycle, Excessive/Low timings for astable and monostable
      multivibrator circuits.
    • Capacitor Cost & Power (PRO): Instantaneous charging voltage Vc(t), present Ic(t),
      time fixed τ, and saved Joules over time.
    • Op-Amp Acquire (PRO): Inverting and non-inverting operational amplifier closed-loop acquire
      (Av) and output voltage.
    • Zener Diode Regulator (PRO): Ballast collection resistor (Rs) and Zener energy dissipation
      score (Pz).
    • PCB Hint Width (PRO): IPC-2221 compliant inside and exterior hint ampacity,
      thickness (oz/ft²), and thermal rise.
    • Wheatstone Bridge (PRO): Balanced and unbalanced bridge calculations for sensor
      resistance (Rx) and output voltage.
  • 24 {Hardware} Pinout Reference Diagrams:

    Interactive customized vector canvas diagrams with color-coded pin features, package deal footprints, and dwell search
    throughout 4 distinct classes:

    • Microcontrollers & Dev Boards (7): Raspberry Pi Pico (RP2040 DIP-40), Arduino Uno
      (DIP-28), Arduino Nano (DIP-30), ESP32 DevKit (DIP-30), ESP8266 NodeMCU (DIP-30), STM32 Blue Capsule
      (DIP-40), ATtiny85 (DIP-8).
    • Analog, Timers & Energy ICs (6): NE555 Timer, LM358 Twin Op-Amp, LM741 Single Op-Amp,
      LM386 Audio Energy Amp, LM7805 +5V Regulator (TO-220), LM317 Adjustable Regulator (TO-220).
    • Digital Logic Gates (6): 7400 Quad NAND, 7404 Hex Inverter, 7408 Quad AND, 7432 Quad
      OR, 7486 Quad XOR, 74HC595 8-Bit Shift Register.
    • Connectors, Sensors & Modules (5): USB Sort-C (Reversible 24-pin), Micro-USB Sort-B
      (5-pin), HC-SR04 Ultrasonic Distance Sensor, DHT11 Temp & Humidity Sensor, SSD1306 0.96” OLED I2C
      Show.
  • Calculation Historical past: Save and overview previous calculation outcomes with Room SQLite persistence,
    plus native JSON backup and restore capabilities in Settings.
  • Tactile Darkish Workbench UI: Excessive-contrast PCB inexperienced accents, customized SI prefix items (Ω,
    kΩ, MΩ, mV, V, mA, A), and decimal precision controls.

Monetization & Enterprise Prepared

  • Google AdMob Built-in: Pre-configured with Google AdMob Adaptive Banner, Interstitial (on
    saves with 60s cooldown), Native
    Superior Card, Rewarded Video, and App Open advertisements, optimized to maximise income. Exposes configuration properties
    securely in native.properties.
  • Twin Unlock Mechanism: Customers can unlock particular person PRO calculators for twenty-four hours by watching a
    Rewarded Video Advert, or buy lifetime entry through Google Play in-App Billing.
  • European GDPR (UMP) Consent: Constructed-in Google Consumer Messaging Platform SDK dialog to make sure
    compliance with European Financial Space (EEA) and UK privateness laws.
  • Google Play Billing Logic: Pre-configured with Google Play Billing Library
    for seamless one-time improve purchases (pro_lifetime) with computerized silent buy restore upon
    reinstall.

Necessities & Stipulations

  • Android Studio: Android Studio Narwhal Function Drop 2025.1.2 or Newer.
  • JDK: Java Improvement Equipment 17 (LTS) or JDK 21.
  • Android OS: Minimal Android 7.0 (API degree 24), Goal API 36 (Android 16).
  • AdMob Account: A Google AdMob account if you happen to plan to monetize with advertisements.
  • Google Play Console Account: For publishing and in-app buy setup.

Essential Disclosures

  • Third-Get together Accounts & Charges: Distributing this app on Google Play requires a Google Play
    Developer account (topic to a one-time registration price). Google additionally takes a platform fee on in-app
    purchases made through Google Play Billing.
  • AdMob Approval: Monetizing with AdMob requires a separate, impartial account and app approval
    course of from Google, which is exterior the scope of this template buy.
  • Free vs PRO Tier: The app consists of 5 core calculators free of charge (Ohm’s Regulation, RC Filter, LED
    Resistor, Voltage Divider, Battery Life). The remaining 7 calculators will be unlocked completely through Google
    Play in-App Buy (pro_lifetime) or
    quickly for twenty-four hours per instrument through Rewarded Video Advertisements. Buying PRO removes all ads.

What You Will Get

  • Full Native Android Supply Code (Java / XML ViewBinding).
  • Complete and Newbie-Pleasant Standalone HTML Documentation with embedded vector UI mockups.
  • Manufacturing ProGuard / R8 Guidelines configuration.
  • Keystore signing template (keystore.properties.instance) and launch failsafe configuration.
  • Vector adaptive launcher icons and graphic property.

High Highlighted Options:

  1. Resistor Colour Code Decoder (4, 5, 6-Band & TCR)
  2. Devoted Workshop Instruments: SMD Part Decoder (EIA, EIA-96, Tantalum) & AWG / E-Collection Tables
  3. 12 Complete Electronics Calculators (Ohm’s Regulation, Battery Life, 555, PCB Hint IPC-2221, Op-Amp, and many others.)
  4. 24 {Hardware} Pinout Diagrams with Vector Canvas (RPi Pico, Arduino, ESP32, 74xx Logic, Sensors)
  5. Offline Room SQLite Calculation Historical past & JSON Export/Import in Settings
  6. Google AdMob Monetization (Banner, Interstitial, Native, Rewarded 24h Move, App Open)
  7. European GDPR (UMP) Consumer Consent Move
  8. Google Play Billing (One-Time Professional Buy & Silent Restore)
  9. 6 Main Languages Localization (EN, ID, ES, JA, DE, FR)
  10. Goal SDK 36 (Android 16) & R8 ProGuard Shrinking


Source

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