Category
Ohm's Law
Ohm's Law Explained: Voltage, Current, and Resistance for Beginners
A plain-language walkthrough of V = I × R — what voltage, current, and resistance actually mean, how they relate, and how to use the triangle trick to rearrange the formula on the fly.
Choosing the Right Resistor for an LED: A Beginner's Guide
Why an LED needs a series resistor at all, how to calculate the right value from supply voltage and forward voltage, and how to round to a real, buyable part.