Electronics & Hardware Tools

Decode resistor bands, size LED resistors and PCB traces, solve Ohm's law, design RC/LC filters and 555 timers, and lay out perfboard — all offline.

Available Utilities

Resistor Color Code Decoder

Decode 4, 5, or 6-band resistor color codes using an interactive visual band-picker, with E12/E24 nearest series value comparison.

Ohm's Law Calculator

Calculate electrical Voltage, Current, Resistance, and Power using any two known variables under Ohm's Law.

Voltage Divider Calculator

Compute output voltage or resistance values for a simple dual-resistor voltage divider network.

LED Resistor Calculator

Determine the required series resistance and minimum power rating for single or multiple series LED indicator circuits.

Series/Parallel Equivalence Calculator

Calculate equivalent values for resistors or capacitors connected in series or parallel networks.

Wheatstone Bridge Calculator

Calculate the bridge output voltage or determine the unknown balancing resistor in a Wheatstone Bridge circuit.

555 Timer Calculator

Design astable or monostable 555 timer circuits, computing frequency, duty cycle, period, and pulse intervals.

Decibel (dB) Converter

Convert linear voltage or power ratios to Decibels (dB) and vice-versa.

RC Filter Cutoff Frequency Calculator

Calculate the cutoff frequency (-3dB) of a resistor-capacitor (RC) low-pass or high-pass passive filter.

LC Resonant Frequency Calculator

Calculate the resonant frequency of an inductor-capacitor (LC) tank circuit.

RF Link Budget Calculator

Calculate Free Space Path Loss (FSPL) and estimate signal power at the receiver for wireless links.

PCB Trace Width Calculator

Calculate PCB trace width for target current limits using the IPC-2221 design standard.

AWG Wire Gauge Calculator

Convert American Wire Gauge (AWG) numbers to diameter, cross-sectional area, copper resistance, and ampacity.

Thermal Resistance Calculator

Calculate semiconductor junction temperature based on power dissipation and thermal resistances.

Capacitor Code Decoder

Decode EIA capacitor three-digit number codes and tolerance factors.

Logic Gate Simulator

Simulate AND, OR, NOT, XOR, NAND, and NOR logic gates dynamically.

PerfBoard & Stripboard Simulator

Interactive CAD-like browser-based simulator for designing, wiring, and testing Perfboard and Stripboard prototype layouts offline.

Category In-Depth Guide & Best Practices

Welcome to the **Electronics & Hardware** suite on ToolSphere — for hardware engineers, IoT makers, DIY electronics enthusiasts, and engineering students. ### Prototyping and CAD simulation Prototyping circuits on perfboard (dot matrix board), stripboard (VeroBoard), or breadboard is a foundational embedded-systems skill. Planning component placement, pin alignment, power rails, and wire netlists before applying solder prevents short circuits and saves development time. The **PerfBoard & Stripboard Simulator** is a 2D CAD environment that runs inside your browser: drag component footprints, map pin connections, route point-to-point wires with netlist propagation, and export to PNG or JSON. ### Component and circuit maths Resistor colour bands, capacitor codes, LED series resistors, voltage dividers, Wheatstone bridges, series/parallel equivalence, RC and LC cutoff frequencies, 555 timer periods, decibel conversions, RF link budgets, PCB trace widths, AWG current ratings, and thermal resistance — each solved locally, with no values leaving your device.

Frequently Asked Questions

What tools are in the Electronics & Hardware category?

The PerfBoard & Stripboard CAD Simulator, resistor colour-code and capacitor-code decoders, Ohm's law, LED resistor, voltage divider, Wheatstone bridge, series/parallel, RC filter, LC resonance, 555 timer, decibel, RF link budget, PCB trace width, AWG wire gauge, thermal resistance calculators, and a logic gate simulator.

Are the calculations accurate enough for production hardware?

They use the standard textbook formulas and are suitable for design work and sanity checks, but always verify against your component datasheets and applicable safety standards (for example IPC-2221 for trace widths) before manufacturing.

Where are the automata and scheduling simulators?

Finite automata, DFA minimisation, parsers, CPU and disk scheduling, Karnaugh maps and truth tables moved to the Student & CS Theory category, which is who actually uses them.