electronics basicsWhat Does a Multimeter Measure?
A beginner-friendly guide to what a multimeter measures in classroom circuits: voltage, resistance, current, and continuity.
From the workbench
News
Teaching notes, project walkthroughs, and hands-on electronics guides from Gary and the Mr Circuit team.
9 posts
Updated Jul 22, 2026
beginner electronicsHow to Read a Circuit Schematic for the First Time
Learn how to read a circuit schematic for the first time with symbol tips, net tracing, and a beginner-safe routine for classroom...
continuity testHow to Find an Open Circuit
Learn how to find an open circuit with a safe continuity and voltage-check routine teachers and beginners can use on breadboards, switches,...
multimeterWhy Students Should Predict Before They Measure
Learn why students should predict before they measure in STEM labs and how a simple prediction routine improves circuit reasoning, safety, and...
breadboardHow to Find a Short Circuit
Learn how to find a short circuit in a simple classroom circuit using a safe power-off routine, resistance checks, and targeted breadboard...
classroom strategiesWhy Troubleshooting Is the Most Important Robotics Skill
Learn why troubleshooting is the most important robotics skill and how to teach it through evidence, iteration, and student-owned debugging routines.
circuitsWhy Troubleshooting Belongs in Every STEM Lesson
Learn why troubleshooting belongs in every STEM lesson and how it builds problem solving, evidence use, student confidence, and real engineering habits.
digital multimeterHow to Teach Students to Use a Digital Multimeter
Teach students to use a digital multimeter with a safe beginner routine for voltage, resistance, and continuity in STEM class.
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.