RotorHunter V2.0 is now finished. It is DOS based and runs well on anything from 486/66 upward.
It will run on a 286 @ 16 MHz but is a bit slow.

RotorHunter for Windows 95/98 is on it's way . I hope to have this one ready for testing by March 2000.

If you are interested in building your own ROTOR HUNTER please email me at [email protected].

For those who may wish to write their software here is an overview of what rotor hunter V1.09 does.

When running in polar mode:

The program looks at 4 things each sample.
(1) voltage across position indicating pot
(2) S meter value of channel A
(3) S meter value of channel B
(4) is the Index hole present (back of beam position)

If the beam is not in the index position then:
(1) the voltage across the pot is fiddled to give a value relative to the front of the car,
(2) The A channel value is used to plot a point on the (hidden) screen and a line drawn from the previous point to the new point
(3) The B channel value is used to plot a point on the (hidden) screen and a dot placed at that point. (this gives a dotted line for channel B on the display)
(4) some additions are done to allow later calculation of peak and average values

If the beam is in the index position - All above occurs AND
(1) Average signals are calculated and printed on hidden screen
(2) peak directions are calculated and plotted on hidden screen
(3) position pot fudge value is calculated and stored for next revolution
(4) O'clock values are calculated and displayed on hidden screen
(5) peak/average rartio is calculated and displayed on hidden screen
(6) annoying beep goes beep
(7) current screen (old data) is cleared
(8) hidden screen is displayed (with all previous revolution data on it)

Then it all starts again

The index position is arranged to be at the back of the beam so all this processing takes place in the least critical area of the sample. ( unless of course you have just driven past the fox)

home page rotorhunter vk3zpf@qsl.net

Copyright 2000 - Peter Fraser - all rights reserved.