adobe photoshop - How can I draw line drawings with the pen tool but with rounded edges?

I understand how to draw shapes with sharp corners using the pen tool, but what I cannot figure out is how to draw shapes in line drawings with rounded edges.

For example here is my drawing in solid, sharp edges lines:

I would like to achieve something more like this:

Answer

You can make circles, and place them on all the corners of the shape. Then edit the original path so that the corners don't show up anymore. Here's a quick little diagram of what I mean:

I don't find this a very reliable way to do it, however. What you need to use is Illustrator, or another vector based program. This is best for drawing shapes and symbols like this.

In Illustrator, it's really easy to do this. Just go to Effect> Stylize> Round Corners.