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I need the display to advance one digit each time i press a push button switch . as simple as that. but as simple as it may sound we all know 7 segment displays use multiplexing, not such a
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When all (seven) segments of the display turned on at once (the numeral 8), the current demand will exceed this 40 mA limit. The image shown below indicates the basic wiring diagram of the current limiting resistors and driver transistors. Next is the Hookup diagram of the Arduino 4 Digit 7 segment LED Display, followed by the Arduino sketch.
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