Paint and Sketchup are the only drawing programs that I know how to use. Paint has become miserable with Windows 7, so that it is almost impossible to draw a straight line, let alone a schematic diagram. So I thought that as an experiment, I would make some freehand electronics symbols in Sketchup, which could then be assembled into schematic diagrams and then copy and pasted into Paint for the captions.

For the sake of comparison, here again is how it looked when I drew the RGB Timer circuit yesterday in Paint:

And without further ado, here is the schematic result for the RGB Timer circuit in Sketchup:

I would say it’s an almost professional improvement. Moreover, once I make some more components in the template file it will be easy to draw any circuit in Sketchup and zoom in and zoom out as desired.