Electronics Toolbox: Circuits

Electronics toolbox with circuit calculators, IC pinouts and SMD codes

Discover electronics in one place with a complete electronics toolkit for students, engineers, and hobbyists. Learn faster with a built-in component reference guide, and solve real circuit problems with an accurate electronics calculator suite.

Component Reference Guide

Get clear, practical descriptions of popular electronic components and IC building blocks, including:

• 555 timer

• Operational amplifier (Op-amp)

• Bipolar junction transistor (BJT)

• Metal oxide semiconductor field-effect transistor (MOSFET)

• Signal diode

• Rectifier diode

• Zener diode

• Capacitors

• Inductors

• Choke coils

• Encoder

• Decoder

• Multiplexers

• Demultiplexers

• Shift registers

• Counter ICs

• ATmega328

• Arduino Uno

• Integrated circuits (ICs)

• And more

Circuit Calculators & Design Tools

Solve common electronics and circuit calculations quickly with tools designed for real-world use:

• Resistor color code

• SMD code lookup

• Resistors in series and parallel

• Capacitors in series and parallel

• Capacitor charge calculator

• Ohm’s law calculator

• Voltage divider calculator

• Resistor ratio

• Resistor Y–Δ / Δ–Y converter

• Resistor Pi, T, and bridged-T attenuator calculators

• LED series resistor calculator

• Adjustable voltage regulator calculator

• 555 timer calculator (astable and monostable)

• Op-amp calculator (inverting, non-inverting, differential)

• Transistor amplifier calculator

• Quiescent point (Q-point) plot visualization

• Filter design: Butterworth filter design

• Active filter: Sallen-Key filter

• Chebyshev and Bessel filter options

• Series RLC resonance calculator

• Capacitive reactance calculator

• Inductive reactance calculator

• Power calculator

• Crossover calculator

• Band-pass filter design

• Band-stop filter design

• PCB trace width calculator

Why you’ll like it

• Fast results for common circuit analysis and design tasks

• Helpful component explanations for learning and quick reference

• Clean, intuitive interface for quick access to tools and docs

Whether you’re studying electronics, designing circuits, or building projects, this app gives you the reference content and calculators you need—right at your fingertips.