OhmicLab: Resistor Calculator

OhmicLab is a lightweight, zero-permission electronics utility built for electrical engineers, technicians, hobbyists, and STEM students. Quickly decode resistor color codes, solve circuit laws, and calculate LED current-limiting resistors—all within a clean, tactile interface designed for fast workbench calculations. OhmicLab operates 100% offline with zero advertisements, zero tracking, and zero system permission requests. ================================= CORE FEATURES & MODULES ================================= 1. INTERACTIVE RESISTOR COLOR CODE DECODER • 4-Band, 5-Band, and 6-Band resistor support. • Visual component graphic: Tap any band to select standard EIA color rings (Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White, Gold, Silver). • Real-time readouts for total resistance, tolerance percentage (±%), and temperature coefficient (ppm/K). • Instant E-Series classification: Check standard series compatibility (E12, E24, E96, E192). 2. OHM'S LAW & POWER MATRIX SOLVER • Input any two known circuit parameters (Voltage V, Current I, Resistance R, or Power P) to immediately solve for the remaining values. • Dynamic display of fundamental physics and circuit relations ($V = I \cdot R$, $P = V \cdot I$, $P = I^2 \cdot R$, $P = V^2 / R$). • Real-time error handling prevents mathematical division by zero and invalid circuit values. 3. LED DROPPING RESISTOR CALCULATOR • Calculate the exact dropping resistor value and power dissipation required to protect your LEDs. • Includes built-in forward voltage ($V_f$) presets for standard LEDs: Red (2.0V), Green (2.2V), Blue (3.3V), White (3.3V), and Yellow (2.1V). • Displays both required resistance in Ohms ($\Omega$) and thermal power dissipation in milliwatts (mW) to help you pick the right resistor wattage. 4. ACCESSIBILITY & CONFIGURATION • Engineering notation toggle: Easily switch between engineering format (e.g., 4.7 kΩ, 1.2 MΩ) and metric decimal representation. • High-contrast color mode: Optimized color palettes for improved visibility and legibility across workbench environments. ================================= WHY OHMICLAB? ================================= • 100% Offline: No internet connection required. Perfect for field work, remote workshops, or aircraft labs. • Zero Permissions: We do not request access to your files, camera, network, contacts, or location. • No Tracking or Ads: No telemetry, no background analytics, and no interruptions. Designed and published by Clearway Homes LTD. Support inquiries: [email protected]

Initial release of OhmicLab v1.0.0: • Interactive 4, 5, and 6-band resistor color code decoder with E-series verification. • Dual-parameter Ohm's Law and power quadrant solver. • LED series dropping resistor and power rating calculator with color presets. • Engineering notation and high-contrast color mode toggles. • Completely offline functionality with zero permissions required.