Input triggered when hand gets close

Other Hardware General Electronics
1

Hello,

I have an issue where my electronics wired up to an input on my arduino is being triggered when my hand gets close to it. It's not wired to a photo sensor or anything, the input should only be triggered when two contacts are closed.

Any suggestions on where I should start to fix the issue? I'm sure you have many questions...

Thanks

2

I'm sure you have many questions...

No this happens when you use an input pin with nothing connected to it.

Use the pinMode(pin, INPUT_PULLUP) call in the setup menu.

Then the input will only trigger ( give a LOW when read ) when the input is connected to ground.

See http://www.thebox.myzen.co.uk/Tutorial/Inputs.html for the full explanation.

3

Grumpy_Mike - you make me not grumpy. That seems to have fixed the issue.

THANKS!