beginner electronicsWhat Is Resistance? Simple Circuit Explanation
Learn what resistance means in a circuit, why resistors protect LEDs, and how to explain ohms to students with simple examples.
From the workbench
News
Teaching notes, project walkthroughs, and hands-on electronics guides from Gary and the Mr Circuit team.
3 posts
Updated Jun 7, 2026
More topics
beginner electronicsWhy LEDs Need Resistors in Simple Circuits
Find out why LEDs need resistors, what happens without one, and how to explain current limiting in a simple student circuit.
color-codeReading the Resistor Color Code Without Memorizing
How to read 4-band 5% and 5-band 1% resistor color codes the way Mr Circuit Lab 1101 and Lab 1201 teach it...