On the face of it, making a clock that displays the time by moving a pointer along a linear scale shouldn’t be too hard. After all, steppers and linear drives should do the job in a jiffy.

You already know that the size of an enlargement is described by its scale factor. For example, a scale factor of 2 means that the side-lengths of the new shape are twice the side-lengths of the ...

Here’s a third model — the linear clock. [Jan Derogee] came up ... moving as the stepper rotates it. There are scales flanking the vertical rod, with the morning hours going up the left ...

The size of an enlargement/reduction is described by its scale factor. For example, a scale factor of 2 means that the new shape is twice the size of the original. A scale factor of 3 means that ...