Sustain Pedal : the right connection

[grass]

Hi there,
I've just bought a MIDI keyboard for my PC.
It has an input for the sustain pedal and I would like to build it myself if it's really so simple as I suppose.

I need a confirmation about the fact that a simple sustain pedal is just an on/off switch; is it so?

I mean, if I take a normal on/off switch and I connect it to the mono cable that I'm going to connect to the keyboard's input, will I obtain it to wotk properly?

I'm not worried about the polarity, I read on the manual that the polarity is read by the keyboard @ power-up and automatically adjusted.

Thanks a lot in advance

 

[boingoman]

It needs to be a momentary switch, otherwise you will have to press it to turn the sustain on, and press it again to turn the sustain off. A momentary switch doesn't "click", for lack of a better word.