Why does the coil keep turning?
Investigate the motor effect, split-ring commutation, dead spots and back-EMF in an orbitable two-pole DC motor.
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The simplest motor in the world, rebuilt in 3D
An alternate homopolar-motor model that makes the looping magnetic field B, current I, force F and rotational dynamics visible.
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The homopolar motor: where current, field and force meet
An insightful visual investigation of how a closed circuit, looping magnetic field and sideways magnetic force produce rotation.
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Using Codex to create a better SLS drag-and-drop activity
A teacher idea becomes a self-contained HTML5 sorting activity with touch support, feedback, accessibility, and teacher analytics.
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Building iwant2study.org as a playable open learning catalogue
A process video and submission-ready story for the OpenAI DevDay 2026 prompt.
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