I need to have my arduino (mega) know the state of my blinker on my car. Not if the signal is high or low (whether the actual signal is high or low), but if the blinker is turned on or off. Yes i could take the signal from before it blinks but i want to take it from the blinker directly. To clari…

Need help on how to approch 12v digital read on a blinking signal

system March 9, 2012, 4:50pm 13

useing 2 resistors as was shown above i would need to connect the ground of my vehicle to that of the arduino right?

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