Is 5 volts the maximum you can connect to a pin being used as an input? I have a sensor that I would like to use but it's minimum voltage is 10 volts dc. I believe that if the sensor activates it would send that voltage to the pin. I know that the board only outputs 5 volts but can it handle a highe…

From the datasheet of the ATmega328 Voltage on any Pin except RESET with respect to Ground . . . . . . . . . . -0.5V to Vcc +0.5V So if the Arduino is running @ 5V, 5,5V is the absolute maximum for a pin. If a sensor outputs 10V when active use a voltage divider to knock it down to 5V.

5 volts max. But you can still use this. The instructions are on page 7 of the datasheet, use the 1st method: NPN (Sinking) Outputs. Get yourself a power supply suitable to the sensor. If it is 10 volts, you could also power the Arduino out of that, through the barrel jack. Any way, connect the…

MAS3: use the 1st method: NPN (Sinking) Outputs. It is not really a method but a choice of model. If you do have the QS18VN6AF40 model it is indeed possible.

If you are receiving voltage a little higher that 5volt on a data pin, put a 10K resistor in series.

So by doing this the sensor is in effect just a switch that is connecting the pin to ground and the operating voltage (10+ volts) just powers the sensor, is that correct? And thanks...that's what I was hoping I could do. MAS3: 5 volts max. But you can still use this. The instructions are on pag…

Which of the three models do you have?

Archibald: Which of the three models do you have? I haven't purchased one yet so all options are available. We have one on a PLC based machine that is sensing the exact same part (.065 dia stainless steel tubing) that I need to sense with my Arduino based controller. So I just need to be sure I …

BillMurphy: I haven't purchased one yet so all options are available. We have one on a PLC based machine that is sensing the exact same part (.065 dia stainless steel tubing) that I need to sense with my Arduino based controller. So I just need to be sure I can interface it with the Arduino. So …

Thank you, I just ordered it. :slight_smile:

Max Voltage allowable to input pin

Other Hardware General Electronics

Paul_B September 2, 2015, 10:11pm 2

BillMurphy:
Is 5 volts the maximum you can connect to a pin being used as an input?

Yes.

Perchance read the datasheet?

Topic		Replies	Views
Using common ground correctly General Electronics	100	1189	July 30, 2024
Analog sensor impluse input over 10+V Sensors	19	514	September 13, 2024
Weird voltage readings General Electronics	35	286	October 10, 2025
Maximum voltage/current of analog pins General Guidance	9	231	January 17, 2025
What's the max current on the 5v pin if I use it as an input on Arduino Nano Classic Nano	8	4811	October 5, 2023

Max Voltage allowable to input pin

Related topics