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Results tagged with led
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user 24265
An LED, a light emitting diode, is a light source often used as an indicator.
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How do you connect 81 LEDs to as few pins as possible?
To light an LED, bring the anode low & cathode high, each will have a unique 'address'. It is easy to light multiples, and you could then properly multiplex them to make 9x9 graphics as well. …
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