This is an old revision of the document!
I added a description of the RR2 commutator as an example of a useful reference. It has links to the manufacturer's datasheet and includes the relevant schematic.
Permissions are now set so that anyone who joins cannot even read any pages; an admin (currently only — mvdm 2013/03/18 16:29) has to add new users to the mvdmlab group before you can read or edit anything. I added everyone to this group.