Is it necessary to add an transistor to the output of my four bit adder. I want to add an led to show the 5 bit output. Should I add a transistor or or just directly connect the anode to the output and cathode to ground
December 20, 2017
Will your full adder source 20 mA? If so then no transistor is needed. Remember to put a resistor in series with the diode to define the right current.
December 21, 2017
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