Automation System
Timing using a TM990 micro-computer:

can be handled in software
is available on the standard CPU board
both (b) and (c)
require an external timer added by the user
None of these

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Automation System
A stepping motor;

is a good choice where continuous rotation is needed
has a commutator
has a speed proportional to voltage input
can index positional movement.
None of these

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