light sensorHow a Light Sensor Works in a Robot
Learn how a light sensor works in a robot by measuring brightness or reflection and turning that signal into a classroom-friendly action.
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Teaching notes, project walkthroughs, and hands-on electronics guides from Gary and the Mr Circuit team.
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Updated Jun 29, 2026
automation basicsInput, Process, Output: The Simplest Way to Explain Automation
Learn how input, process, and output explain automation in a simple way students can apply to circuits, sensors, and beginner robots.
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.
beginner roboticsHow Robots Use Sensors to Make Decisions
Learn how robots use sensors to detect light, distance, and contact, then make simple decisions students can see in real classroom builds.
beginner electronicsCircuits Students Should Understand Before Robotics
Teach robotics with less confusion by covering the circuit ideas students need first: power, closed loops, polarity, sensors, motors, and troubleshooting.