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Topic: 12v -> 5v input on Digital/Analog pins? (Read 597 times) previous topic - next topic


I have some switches that output 12v, which I need to connect to the arduino input pins.

Is a 1A Positive Fixed Voltage Regulator,
Part: TS7805CZ   
Output voltage: 5V   
Line regulation: 3mV

suitable for this?


Use a 4.7k or so resistor and a 5.1V zener.
"Optiboot: the Tiffany Yep of Arduino bootloaders."


Or a potential divider, using two resistors.

Or a 4K7 series resistor and a diode to the +5V line.

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