BBC micro and 3 magnetometers

[Doodlebug]

Many still play games on the historic BBC micro.
I've always considered it was worthy of more than that.

Now  have 3 fluxgate magnetometers each feeding their outputs into an
ADVAL input on micro and recorded to disk as 3 files.

3 fluxgates  are detecting changes in earth's magnetic field in all directions.
Program written for micro shows east/west as horizontal position on screen and
north/south as vertical position.

The vertical input is now drawn as a vertical line whose length represents
the vert component of the magnetic field.
So when played back this line will wander about the screen
varying in length as it goes.

   

[BusyBee]

It's good to hear of one that is still going, with useful purpose. I think that many would view them as primitive these days but many of the older micros are still useful enough for quite involved tasks.

Tracy

[peter scott]

You need these to compare with your results.

   

Peter

[Doodlebug]

That only shows direction whereas I am plotting field strength changes
not direction.
I do have a torsion magnetometer though that can show directional changes.
The trouble is that every time a car goes by 60 feet away it goes
bonkers. :-)