DIGITAL INPUTS PROPER USAGE

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jathanas
Posts: 3
Joined: Wed Feb 27, 2019 8:51 pm

DIGITAL INPUTS PROPER USAGE

Post by jathanas » Wed Feb 27, 2019 9:12 pm

Hi, i have two simple questions about the proper usage of the digital input of Controllino mini powered with a 12V DC power supply.

1) If i want to use the digital input of A0 on the screw terminal i just connect the 12V of the power supply straight to the A0 on the screw terminal in series with a switch but without a protection or a pulldown resistor.

2) If i want to use the digital input of A0 on the pin header i just connect the 5V of the pinheader straight to the A0 pin on the pinheader in series with a switch but without a protection or a pulldown resistor.

Are those two simple connections considered proper usage of the controllino?

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Mr. CONTROLLINO
Posts: 19
Joined: Thu Dec 13, 2018 3:07 pm

Re: DIGITAL INPUTS PROPER USAGE

Post by Mr. CONTROLLINO » Tue Mar 05, 2019 1:54 pm

Hello,

Yes, this is correct!
The internal voltage divider is already puling the input down. So, there is no need for an external pulldown.


regards
Marco

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