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Topic: Is my board dead (Read 394 times) previous topic - next topic

gorstj

I have set pins 2 & 3 on my Uno to be INPUT_PULLUP and digital.write HIGH to enable the internal pullup resistor.

I am sure it was working (but have changed the hardware and software), now it is not....

Putting a multimeter between the pin 2 and ground gives 1.00v
Going between pin 3 and ground gives circa 5v

If I digital-write low to pin 2 then it reads 0v

Is pin 2 now dead? (I was planning on using it as an interrupt)

Thanks for any help (this is my first Ardunio project)

Nick Gammon

Show your code please.

Preferably a 5-line program that demonstrates what you are saying, and re-test with this program.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

gorstj

Thanks for your help.

Worked it out as soon as I woke up! I left a 10k pull down resistor attached to that pin in my circuit.
After removal all working well

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