Continuity signal

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi guys,

I have a device which is normaly open which closes to create a continuity signal but I cant seem to connect this to the arduino...

I am currently connecting 0v - 5v switches to the arduino and these are working fine so dont understand why this will not work with the same connections...

I am a beginner with all of this so any obvious help would be appreciated!! ;D

Thanks

2

I have a device which is normaly open which closes to create a continuity signa

So connect one to the arduino pin and the other end to ground.
Make the pin an input and then enable the internal pull up resistor by doing a digital write HIGH to the pin.

3

Make the pin an input and then enable the internal pull up resistor by doing a digital write HIGH to the pin.

hi want to do a continuity test like this can you elaborate more on pull up resitor ?

thanks

4

It's a resistor that goes from the input up to 5V.
There is one built in inside the arduino. You activate it like I said. See:-
http://www.thebox.myzen.co.uk/Tutorial/Inputs.html