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Teaching notes, project walkthroughs, and hands-on electronics guides from Gary and the Mr Circuit team.

2 posts Updated Jun 29, 2026
Lit LED on a beginner breadboard circuit with a battery and resistor
beginner electronicsWhat Is an LED? Simple Student Guide

Learn what an LED is, how it makes light, why polarity and resistors matter, and how to teach LEDs safely in beginner...

Jun 29, 2026· 4 min read
Beginner electronics graphic showing a capacitor on a breadboard with simple circuit connections
beginner electronicsWhat Is a Capacitor? Simple Student Guide

Learn what a capacitor is, how it stores and releases energy, and how to explain polarized and non-polarized capacitors in beginner circuits.

Jun 29, 2026· 5 min read