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

54 posts Updated Jun 18, 2026
Beginner classroom circuit showing the difference between a connected path and a broken path
beginner electronicsOpen Circuit vs Closed Circuit

Learn the difference between an open circuit and a closed circuit with simple examples, classroom language, and a quick troubleshooting checklist.

Jun 18, 2026· 4 min read
Mr Circuit kit of the month, coloring book lab, and basic electronics kit arranged as a bitmap hero for a weekly STEM routine at home article
beginner electronicsHow to Build a Weekly STEM Routine at Home

Build a weekly STEM routine at home with short sessions, low-prep materials, reflection prompts, and simple electronics projects kids can repeat.

Jun 12, 2026· 4 min read
Breadboard-style night-light circuit diagram with labeled photoresistor transistor LED output and series resistor
beginner electronicsHow to Build a Simple Night-Light Circuit

Build a simple night-light circuit on a breadboard with a photocell, LED, resistor, and transistor using this beginner-friendly classroom guide.

Jun 7, 2026· 5 min read
Simple LED breadboard circuit with a series resistor for classroom electronics
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.

Jun 5, 2026· 4 min read