<ul><li>Marv's Lab conducted an experiment to determine the value of Planck's Constant using LEDs and a multimeter.</li><li>The setup includes a PCB with LEDs of different wavelengths, a rotary switch, and connectors for current measurement.</li><li>By measuring the voltage required to light the LEDs and using Planck's relation for photon energy, the constant can be calculated.</li><li>The experiment resulted in reaching within 5% of the canonical value of Planck's Constant.</li></ul>

Determine Fundamental Constants with LEDs and a Multimeter

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