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

1 post Updated Jun 5, 2026
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Close view of a resistor and LED in a simple breadboard circuit
beginner electronicsHow a Resistor Works in a Simple LED Circuit

See how a resistor controls current in a simple LED circuit, protects the LED, and gives teachers a clear beginner electronics example.

Jun 5, 2026· 4 min read