Welcome to CircuitsLab
Interactive Electronics Engineering
Visualize, Calculate, and Design with precision.
Engineering Toolkit
Power & Regulation
Boost Converter
Design step-up switching regulators. Calculate L and C values.
Buck Converter
Design step-down switching regulators. Calculate L and C values.
LM317 Calculator
Design adjustable voltage regulators using the LM317.
Zener Regulator
Design Zener diode voltage regulators and calculate series resistance.
Voltage Divider
Calculate output voltage and visualize the circuit behavior.
Battery Life
Estimate battery runtime for your load and capacity.
Battery Pack Builder
Design custom Li-Ion packs. Calculate S/P configuration and total energy.
Wire Voltage Drop
Calculate voltage drop across long wire runs.
Solar String Sizing
Optimize solar panel series/parallel configurations for your inverter.
Components & Standards
Resistor Color Code
Decode 4, 5, and 6 band resistor color codes with visual feedback.
Inductor Color Code
Decode inductor color bands to find inductance values.
LED Resistor
Determine the perfect series resistor for your LED circuits.
Heat Sink Calculator
Determine required thermal resistance to keep components cool.
PCB Trace Width
Calculate required trace width for given current and temperature rise.
PCB Via Calculator
Calculate current capacity and thermal rise for PCB vias.
Stepper Torque
Calculate required torque for stepper motor applications.
RF & Antennas
Microstrip Patch
Design rectangular patch antennas. Calculate dimensions and efficiency.
Coax Cable Loss
Estimate attenuation and power handling for common coaxial cables.
RF Link Budget
Calculate Friis transmission equation, path loss, and received power.
Skin Depth
Calculate AC current penetration depth in conductors at RF frequencies.
Planar Inductor
Design PCB spiral inductors. Calculate Inductance and Q.
Signals & Filters
RC Filter
Design Low Pass and High Pass RC filters with Bode plots.
LC Filter Design
Calculate L and C values for 2nd order Pi and T filters.
LC Resonance
Calculate resonant frequency of LC circuits and visualize the response
curve.
Audio Crossover
Design 2-Way Passive Speaker Crossovers (1st & 2nd Order).
Op-Amp Gain
Calculate gain for Inverting and Non-Inverting Op-Amp circuits.
ADC/DAC Calculator
Calculate Resolution, Step Size (LSB), and Quantization.
dBm Converter
Convert between dBm, Watts, Volts, and other power units.
dB SPL Calculator
Estimate Sound Pressure Level at a distance from the source.
Wheatstone Bridge
Calculate bridge balance and output voltage for sensor applications.
555 Timer
Design Astable and Monostable 555 timer circuits with timing diagrams.
Digital Logic
Boolean Solver
Simplify Boolean expressions and generate Truth Tables.
Digital Logic Builder
Design logic circuits with AND, OR, NOT gates. Real-time simulation.
Logic Gate Visualizer
Interactive Truth Tables for AND, OR, NOT, XOR, NAND, NOR.
7-Segment Decoder
Visualize Hex codes on a Seven Segment Display.
Base Converter
Convert between Binary, Octal, Decimal, and Hexadecimal.