My new design is close to the classcial design, with some small, but for my opinion significant changes:

1. The computing elements are plugged into the connection board, thus it is possible to archive calculations.
2. As the computing elements are pluggable, the configuration can be adapted; there is no other limit for the computing elements than the number of slols.
3. Computing elements have a current input as primary input, thus avoiding a lack of input menans.
4. Potentiometeres deliver a current, not a voltage; thus can be calibrated in advance.
5. Digitally set potentimeters allow quick and precise setup.
6. The modules can be configured with jumpers for various functions.
7. Integrators have a very quick initialisation circuit and can thus be used as track-and-hold
8. Initial conditions for integrators can be set with potentiometers on the module, but also via a current input.
9. The adder has options to function as (inverting) adder, precision rectifier or comparator; no free wiring of components is required.
10. Potentiometers have a (digital) switch than can disable the output; so more than one signal can be switched directly, and no switches are necessary on calculating modules.
11. Power supply is only (precise) 30V DC. Calculations use ±10V.
12. A module is small: 100mm x 14mm and can be made on perfboard with 2.54mm spacing.
13. Connections use a common and affordable prototype plugboard.
14. Repetitive operation not yet provided