can't remember off hand which key number it is but you can use the [key] object

make a patch like this

[key]
|
[(number)]

and note the number that flashes up when you press the space bar then

[key]
|
[sel *space bar number*]
|
[O]

I'll post a patch later if you're still stuck

From: pat@digitalworlds.ufl.edu
To: pd-list@iem.at
Date: Thu, 26 Jan 2012 15:53:33 +0000
Subject: [PD] space bar generates a bang

A beginner Question:

What is the easiest way to generate a bang with a keyboard space bar?

I would love replies in patch form

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