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People who are (probably) new to electronics need to know to NOT leave digital chip input pins floating. A circuit example didn’t follow this rule, and after I made two comments about pin floating, the creator deleted the circuit.
The above example was the input method for a digital chip, which, as you can see, is an incorrect method for applying a “HIGH” or “LOW” state. Incorrect because not only is the input left floating when the switch is open, but a logic LOW voltage is applied when the switch is closed, so the pin is either floating or LOW. The bottom example is a correct way of getting desired results.
The obvious message this circuit has is to not leave pins floating.
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