Engineer’s
Complete Toolkit
30+ precision utilities for hardware engineers — chip decoding, resistor & capacitor calculations, PCB design, SMD identification, and more. Built for BrazyTechnologies.
Component Fault Finder New
Quickly determine if electronic components are good or faulty using multimeter readings. Test diodes, Schottky, Zeners, transistors, and voltage regulators instantly.
SMD Code Finder
Identify SMD components from package codes. Find diodes, Schottky, Zeners, transistors, regulators, and ICs with datasheet links.
Resistor Calculator
Decode resistor color bands or calculate values from ohms. Includes tolerance, temp coefficient, and E-series standards.
Capacitor Calculator
Convert capacitance codes, calculate series/parallel combos, decode markings, and find SMD & through-hole equivalents.
Inductance Calculator LIVE
Calculate inductance for different coil geometries. Support for air-core, ferrite-core, and toroidal inductors.
Ohm's Law · Power
Interactive Ohm's law & power calculator. Enter any two values to get the rest. Also computes energy and charge.
Voltage Divider
Calculate output voltage, resistor values, or input voltage. Includes E24/E96 series suggestions for precision design.
Op-Amp Gain Calculator LIVE
Calculate gain and feedback components for inverting, non-inverting, and differential amplifier configurations.
Filter Designer
Design low-pass, high-pass, band-pass, and band-stop filters. Calculate cutoff frequency, component values, and view Bode plots.
RC Time Constant LIVE
Calculate charge/discharge time for RC circuits. Find component values for a desired time constant or frequency.
555 Timer Calculator LIVE
Design astable, monostable, and bistable 555 timer circuits. Calculate frequency, duty cycle, and component values.
PWM Calculator LIVE
Calculate PWM frequency, resolution, and timer settings for microcontrollers. Supports Arduino, ESP32, STM32.
ADC Calculator LIVE
Convert ADC values to voltage and physical units. Calculate required voltage dividers for ADC input scaling.
LED Resistor
Calculate the perfect series resistor for LEDs. Supports single, series, and parallel strings with power dissipation.
Battery Life Estimator LIVE
Calculate battery runtime based on capacity, current draw, and efficiency. Includes quiescent current and standby time.
Linear Power Supply LIVE
Calculate transformer, rectifier, and filter capacitor values for linear power supply designs.
Buck/Boost Converter LIVE
Calculate inductor, capacitor, and feedback resistor values for switching regulator designs.
PCB Trace Width LIVE
Calculate trace width for current carrying capacity, temperature rise, and copper weight. IPC-2221 compliant.
Via Size Calculator LIVE
Calculate via dimensions for current carrying capacity and thermal performance.
Impedance Calculator LIVE
Calculate characteristic impedance for PCB traces. Supports microstrip, stripline, and coplanar waveguide.
Thermistor Calculator LIVE
Convert thermistor resistance to temperature using Steinhart-Hart equation. Supports NTC and PTC thermistors.
LDR Light Sensor LIVE
Convert LDR resistance to lux levels. Calculate voltage divider values for light sensing applications.
LC Resonance LIVE
Calculate resonant frequency, Q factor, and bandwidth for LC circuits. Essential for tuned circuits and filters.
Antenna Length LIVE
Calculate quarter-wave and half-wave antenna lengths for any frequency. Supports various antenna types.
Wire Gauge Calculator LIVE
Calculate required wire gauge for current, voltage drop, and length. Supports AWG, mm², and SWG standards.
Voltage Drop LIVE
Calculate voltage drop over cable length. Essential for power distribution and wiring design.
Audio Crossover LIVE
Design 2-way and 3-way speaker crossovers. Calculate component values for Butterworth and Linkwitz-Riley topologies.
dB Calculator LIVE
Convert between decibels, voltage, power, and amplitude ratios. Essential for audio and RF work.
Heat Sink Calculator LIVE
Calculate required heat sink size for power dissipation. Includes thermal resistance and junction temperature.
PCB Thermal Calculator LIVE
Calculate PCB temperature rise from power dissipation. Includes copper weight and trace geometry.