About CircuitsLab Wiki

Most electronics resources give you an equation and leave you to figure out what it actually means. We'd rather show you - every calculator here is also a live simulator, so you can see how changing a value actually changes the circuit, not just what number comes out the other end.

Why this exists

CircuitsLab Wiki started as a side project because the existing tools online were either too basic, buried in ads, or explained things in a way that only made sense if you already knew the answer. A resistor color code chart doesn't teach you resistors - it just gives you a lookup table. We wanted something you could actually learn from while using it.

What's here

The site currently hosts 35+ interactive calculators and visualizers, spanning:

• Fundamentals - resistor color codes, Ohm's law, voltage dividers
• Power electronics - buck/boost converters, filter design
• Timing & signals - 555 timer configurations, RC circuits
• RF & antenna design - for the more advanced end of things

Each tool is built to go beyond "plug in numbers, get an answer." Where it's useful, you'll find worked examples, common mistakes to avoid, and guidance on when to use one approach over another - the kind of context you'd normally only get from a textbook or a mentor looking over your shoulder.

Who it's for

Students trying to build intuition instead of memorizing formulas. Hobbyists prototyping a project who need a quick, reliable reference. Engineers who just want a fast tool without wading through a cluttered, ad-heavy site to get to it.

Where it's headed

This is an actively maintained project, not a finished product. New calculators, better explanations, and cleaner tools are added regularly based on what people actually search for and ask about. If there's a calculator or visualizer you wish existed, we want to hear about it.