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Project Notes

#581 Calculators

Catalog of online tools for electrical and electronic conversion, identification and calculation.

Build

My Calculators

  • My Toolbox includes
    • LM317 Calculator
    • Microphone Sensitivity Calculator
    • Ohm’s Law Calculator
    • Resistor Calculator
    • Capacitor Calculator
  • Visual555 - my version of an astable/monostable calculator with animations

Other Calculators

  • WolframAlpha general purpose tool that knows how to calculate most properties related to electronics (if you can provide the formula)
  • Online Conversion Calculators by DigiKey - collection of conversion and calculation tools, including
    • 555 Timer Calculator
    • Attenuator Calculator
    • Battery Life Calculator
    • Capacitance Conversion
    • Capacitor Safety Discharge Calculator
    • Current Divider Calculator
    • dBm to Watts Conversion
    • Decimal Fraction Conversion
    • Electrical Plug Reference Calculator
    • Energy Conversion
    • Force Conversion
    • Frequency to Wavelength Conversion
    • Inductance Conversion
    • LED Series Resistor Calculator
    • Length Conversion
    • Low Pass/High Pass Filter Calculator
    • Number Conversion
    • Ohm’s Law Calculator
    • Parallel and Series Resistor Calculator
    • PCB Trace Width Calculator
    • Pressure Conversion
    • Reactance Calculator
    • Resistor Color Code Calculator
    • Series and Parallel Capacitor Calculator
    • SMD Capacitor Code Calculator
    • SMD Resistor Code Calculator
    • Temperature Conversion
    • Three Phase Calculator
    • Time Constant Calculator
    • Trace Impedance Calculator
    • Voltage Divider Calculator
    • Volume Conversion
    • Weight Conversion
    • Wire Size Conversion Calculator
  • 66pacific Online Calculators including:
    • Small Transmitting Loop Antennas
    • Full-Wave Loop Antennas
    • Quarter-Wave Vertical Antennas
    • Coil-Shortened Vertical Antennas
    • Dipole Antenna Length
    • Coil-Shortened Dipole Antenna
    • Coil Inductance
    • Toroid Coil Winding
    • Wire Gauge & Diameter
    • Capacitance (Capacitor Design)
    • Capacitive Reactance (Xc)
    • Inductive Reactance (XL)
    • Body Mass Index (BMI) Calculator
  • daycounter Electronics Calculators Index - large list of online calculators including:
    • Passive Component Properties
      • Air Core Inductor Coil Inductance Calculator
      • AWG (American Wire Gauge) Diameter and Resistance Chart
      • Capacitor-Energy-Time-Constant-Calculator
      • Coil Physical Properties Calculator
      • Inductor Stored Energy Calculator
      • Parallel Resistance Calculator
      • Parallel Resistor Combination Calculator
      • Plate Capacitor Capacitance Calculator
      • Reactance Calculator
      • RMS and Average Calculator
      • Standard Resistor Value Calculator
      • Steinhart-Hart Thermistor Calculator
      • Straight Wire Inductor Calculator
      • Solenoid Force Calculator
      • Thermal Noise Calculator
      • Voltage Divider Calculator
      • Voltage Summer Calculator
      • WheatStone Bridge Calculator
      • Series - Parallel Impedance Conversion Calculator
    • Electronics
      • BJT Cascode Amplifier Calculator
      • BJT Differential Amplifier Calculator
      • BJT Transistor as a Switch, Saturation Calculator
      • Comparator Hysteresis Calculator
      • How to wire an LED, Tutorial and Resistor Calculator
      • JFET Buffer Bias Calculator
      • MSP430 UART Register Value Calculator
      • NE555 Astable Multivibrator (Oscillator) Frequency and Duty Cycle Calculator
      • NPN Transistor Bias Calculator
      • Op-Amp (Inverting) Resistor Calculator
      • Op-Amp (Non-Inverting) Resistor-Calculator
      • Op-Amp Voltage Calculator
    • Filters
      • Sallen-Key Low Pass Filter Calculator
      • Sallen-Key High Pass Filter Calculator
      • LC Low Pass Butterworth Filter Calculator
    • Motors
      • Stepper Motor Calculator
      • Lead Screw Torque Calculator
    • Power Supplies
      • LM25085 Switching Regulator Calculator
      • Data Logger Battery Life Calculator
      • Flyback Transformer Design and Calculator
      • Flyback SMPS Calculator
      • Heat Sink Temperature Calculator
      • Inductor Current and Maximum Power Calculator
      • Inrush Current Limiting Load Switch Calculator
      • Voltage Regulator Resistor Divider Calculator
      • Snubber Design Calculator
      • Switching Power Supply Calculator
    • RF
      • Complete RF Amplifier Design and Analysis Calculator
      • Decibel Calculator
      • Friis Path loss Calculator
      • Helical Antenna Design Calculator
      • LC Resonance Calculator
      • L Matching Network Calculator
      • Maximum Field Strength Calculator
      • Maximum Flux Density Calculator
      • Microstrip Inductor Calculator
      • PI and T Pad Attenuator Calculator
      • Quarter Wavelength Transformer Calculator
      • Rollet Stability (K) Factor Calculator
      • Skin Effect Depth Calculator
      • Whip Antenna Design Calculator
      • Z-S-Y Parameter Conversion Calculator
    • Mechanical Engineering
      • Helical Spring Mandrel Design Calculator
    • CAD/CAM
      • Bevel Gear Calculator
      • Feed Rate Calculator
      • GCode-Tool Path Generator for Milling Circles
      • G-Code Tool Path Generator for Drilling Holes
      • GCode-Tool Path Generator for Milling Inner of Rectangles
      • GCode Tool Path Generator for Planing Stock with Fly Cutter
      • GCode Tool Path Generator for Series of Points
      • GCode Tool Path Generator for Trimming End Stock
      • Geometric Scaling of a Triangle
      • Line Segment Angle Calculator
      • Polar / Rectangular Coordinate Conversion Calculator
      • Pully Speed Calculator
      • Timing Belt Pulley Design Calculator
    • Programming
      • Exponentially Decaying Wave Lookup Table Generator Calculator
      • Sine Lookup Table Generator Calculator
      • Triangle Wave Lookup Table Generator Calculator
  • MUST online calculators for electronics - another large collection
  • Ohm’s Law - a collection of a few calculators and references, including
    • Ohm’s Law Calculator
    • Voltage Divider Calculator
    • mcd to Lumens Converter
    • LED Resistor Calculator
    • 555 Astable Circuit Calculator
    • 555 Monostable Circuit Calculator
  • Other specific calculators
About LEAP#581 Notebook

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

Project Source on GitHub Return to the LEAP Catalog
About LEAP

LEAP is my personal collection of electronics projects - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting.

Projects are often inspired by things found wild on the net, or ideas from the many great electronics podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know or send a pull-request.

NOTE: For a while I included various scale modelling projects here too, but I've now split them off into a new repository: check out LittleModelArt if you are looking for these projects.

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