After the good experiences with the RG14-mini, the new analog computer RG21 is on its way.

It does not have any plugboard; it is fully digitally configurable and uses a bus for connecting the computing elements.

The documentation of the current version is not yet fixed; currently, three documents are provided (in German, drop me a line if you are interested in a translation):

• RG21 architectural description
• Functor (calculating element)
• Connector (connection element)

All designs can be freely used, if there is interest.