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Spare pin on Digital Header 2 usage.


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#1 coleg12

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Posted 21 June 2016 - 02:24 AM

Hello,

According to Netduino P2 schematic pin 8 on Digital Header 2 (upper right part of the diagram, the one with digital I/0 8-13) is not connected to anything on the board as per my understanding. Could somebody either confirm it or correct me please.

I'm considering to connect it to 5V pin by jump wire and use single cable from that header to connect to Paralax motion sensors as an convenient way to have digital input, ground (pin 7 on that header) and 5V through one cable.

 

Is this way of modifying board advisable? Is any risk to the board by such modification? I can make another cable from Power Header to supply power to sensors as alternative of course.

 

Thanks in advance for any input!



#2 Nevyn

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Posted 22 June 2016 - 07:52 AM

Pin 8 (AREF) is used to supply the analogue reference voltage to the Arduino boards.  On the Netduino P2 the board uses the onboard 3.3V supply for the analogue reference voltage.  This means that there is no need to connect this pin.

 

Regards,

Mark


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#3 coleg12

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Posted 23 June 2016 - 12:19 AM

Thanks, Mark for your input!

Looks to me as it's fine  to proceed on Netduino P2 board, but be aware that it might be problem on other boards. 

Regards,

Oleg






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