Get freedom from your phone’s obvious limitations. Use Electronics Toolbox Pro, made by Peter Ho, a Tools app on your PC or Mac with BlueStacks, and level up your experience.

About the App

Electronics Toolbox Pro by Peter Ho is a handy go-to for anyone working with circuits—whether you’re just starting out, or you’ve been soldering for years. Think of it like a digital notepad that knows all the key formulas and values, so you don’t have to pause your project to look them up. It’s straightforward, fast, and totally focused on helping you get the calculations you need, right when you need them.

App Features

• Simple Resistor Calculators
  Figure out the resistance for two resistors in series or parallel without grabbing a calculator. Enter your values and get instant answers.

• Find Combinations for Specific Resistances
  Need a specific resistance? The app helps you discover which series or parallel resistor combos will hit your target value.

• Voltage Divider Helper
  Easily punch in values to calculate voltage divider ratios and explore resistor pairs that will match your requirements.

• Op-Amp Gain Calculations
  Get quick answers when designing inverting amplifiers. Input your numbers and the app provides the right resistor combos for your gain ratio.

• Ohm’s Law at Your Fingertips
  No need to remember the formula—just enter what you know, and Electronics Toolbox Pro will handle the rest.

• Star-Delta Converter
  Easily swap between star and delta configurations with just a couple of taps.

• RC and RL Circuit Tools
  Whether you’re working on filters or timing circuits, find cutoff frequencies or time constants using resistor/capacitor or resistor/inductor values. You can also discover new value pairs that’ll give you the frequency or timing you want.

• LC and Astable Circuit Calculators
  Planning an oscillator or frequency circuit? Calculate resonant frequencies for LC circuits or get the right timing for astable and monostable multivibrators.

• Ad-Free Experience
  In the Pro version, you won’t see any ads—just pure functionality. There are also no limits holding you back.

Electronics Toolbox Pro works great on your phone, and for those times when you want a bigger screen (maybe you’re pulling up reference values alongside a schematic), it plays nicely with BlueStacks.

Switch to BlueStacks and make the most of your apps on your PC or Mac.