Hi all,

I've got a PIC project with a speed control that is a pot as the
R in RC mode

One option I would like is to be able to set a mid-point frequency
such that moving the pot fully counter-clockwise will be the same
ratio as slow as fully clockwise is as fast

The equation would be x * (1/y) < x > x * y

For example, in the range 2 to 32, 8 (=3Dx) is the 'midpoint' and y =3D 4

2 is 8 * 1/4 and 32 is 8 * 4

How would I (can I) resolve the equation to find 'x', the midpoint,
if I have just the range, which in this case is 500kHz to 4100kHz ?

I can guess at say 1400kHz. 1400/500 =3D 2.8. 2.8 * 1400 =3D 3920,
which is close but there must be a better way

TIA
--=20
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