Everything for Electronics
Nuts & Volts Magazine (July 2005)

Optical Illusion and the Light Emitting Diode

By James Antonakos    View In Digital Edition  

My three-year-old daughter recently became fascinated by a small hand-held electronic toy that spins a disk round and round very quickly (see Figure 1). Light emitting diodes (LEDs)mounted on the edge of the disk turn on and off in all sorts of interesting patterns. Those familiar with my background in electronics will recognize that I cannot stand idly by, watching this $10.00 toy flash its lights at me without beginning to think about how to do it myself.


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