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9 July, 05:16

Describe the effect of a pull up resistor

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  1. 9 July, 05:23
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    With a pull-up resistor, the input pin will read a high state when the button is not pressed. In other words, a small amount of current is flowing between VCC and the input pin (not to ground), thus the input pin reads close to VCC. When the button is pressed, it connects the input pin directly to ground.
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