Make a Kaleidoscope With Wireless LEDs
By Debra Ansell
Working with “wireless” LEDs feels a bit like magic. These tiny LED assemblies can emit light without directly connecting to a power supply. The secret to their energy source is a nearby wire coil in which a high-frequency oscillating current generates a fluctuating magnetic field. Each induction-powered LED is attached to its own tiny wire coil, […]
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December 23, 2022 at 05:00PM
via Make: DIY Projects and Ideas for Makers https://ift.tt/SCwk91e
3d print ......errori ed esperienze, 
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