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Each light-emitting segment is nothing but an LED, which is electrically similar to

any other diode. Once the forward voltage exceeds something around 1.7 volts,

the resistance of the diode becomes very verysmall. At any higher voltage, it

would literally appear as a "short" circuit, without a separate series limiting resistor.

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Q: Why the limiting resistors are need in 7-segment display?
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