Hello This is my first arduino project and I was trying to test a simple program that uses pin 14 as an output to an LED and Pin 9 as an input for a button. The program simply waits for pin 9 to go high when the button is pushed. My issue is that i connect the LED from pin 14 to the negative power …

Lilypad USB Pin 9 goes high without being connected in a circuit

system February 10, 2014, 3:58pm 5

As Grumpy-Mike says add a pull down or up resistor to avoid the false high states

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