my first spin @ using fritzing.. external dc circuit 24vdc... wasn't in drop down chose 12vdc. 5.1 zener , 10k resistor..
i measure lead going digital in , reading 4.4-4.5vdc.. , understanding on 3vdc should draw digital in high... stays low... not sure missing.. used a0 measure voltage , a0 took reading of ~4.5.. kinda stumped on missing..
i measure lead going digital in , reading 4.4-4.5vdc.. , understanding on 3vdc should draw digital in high... stays low... not sure missing.. used a0 measure voltage , a0 took reading of ~4.5.. kinda stumped on missing..
can't tell without code
Arduino Forum > Using Arduino > General Electronics > Digital Input not going HIGH
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