NestOhm

NestOhm is a circuit workbench utility application designed to help electronics hobbyists, students, and engineers quickly calculate electrical values, decode component markings, and design simple circuit stages.

All tools work entirely offline with instant calculations and manual inputs.

Key Features:

* Resistor Color Code Decoder:
- Decode standard 4-band and 5-band resistors.
- Interactive color selector for each band (digit, multiplier, tolerance).
- Instantly view resistance value with automated units (ohms, kΩ, MΩ, GΩ) and tolerance percentage.

Ohm's Law & Power Calculator:
- Calculate Voltage (V), Current (A), Resistance (Ω), and Power (W).
- Input any two known values ​​to instantly solve for the remaining two.
- Displays the mathematical formulas used for transparency and learning.

SMD Mark Decoder:
- Decode SMD resistor and capacitor markings.
- Supports 3-digit, 4-digit, and EIA-96 marking systems.
- Instantly retrieve the calculated resistance or capacitance along with standard tolerance rates.
- Offers shortcut presets for common codes (e.g., 103, 4R7, 104, 222K).

* LED Series Resistor Calculator:
- Calculate the series resistor needed to safely power one or more LEDs.
- Input supply voltage, forward voltage, operating current, and LED count.
- Select color presets (Red, Yellow, Green, Blue, White) to automatically fill forward voltage.
- Get the exact resistor value and the recommended standard power rating (e.g., 1/4 W, 1/2 W) with safety margins.

* Op-Amp Gain Calculator:
- Design inverting and non-inverting operational amplifier configurations.
- Input supply voltage, Rin, and Rf to calculate closed-loop gain and output voltage.
- Apply preset target gain levels (1x, 2x, 5x, 10x, 20x, 50x, 100x) for quick component selection.

* Standard E-Series Lookup:
- Search and browse standard component values ​​across E6, E12, E24, and E96 series.
- Find the closest standard manufactured component value for any calculated target.
- View the deviation percentage error for matching standard components.

* Workbench Activity Log:
- Automatically saves your calculations locally.
- Access details of past calculations from the recent activity log on the dashboard.
- Delete individual items or clear the entire history log at any time.