So this project is still going, I've just been stalled on the issue of linking handle travel to the Halls in the throttle.

What I'm now looking at, is replacing the main bolt upon which everything hinges with something hollow. I kept looking at the throttle setup, wondering how to get the linkage to adapt to the incredible range of travel, and a few hacks and slashes later, I'm left right back where I started, except with a few pointless holes drilled in the throttle.

The plan is to use the concept behind Sokol1's Bic assembly, except to make the "bic" the very axis upon which both throttles pivot. With magnets attached to either side of each throttle, and the Halls assembled in the middle, this seems the best way to take the massive and awkward range of mechanical travel out of play.

The advantage to this, is it allows for zero mechanical slop, and is pretty clean when all is said and done.

What I'm wondering, is would I be able to get something like say, a copper tube, that's threaded yet hollow in the center, in the same size as the main bolt. I've attached the pic below to show what I'm getting at:


That silver bolt sticking out of the base would need to be replaced with something hollow.

My concerns are:
If the tube is non-magnetic (like say, copper or brass) would it insulate the Hall from magnets placed outside said tube? The idea here is the shaft does not move, but the throttle handle rotates around it (this is the way it is currently arranged)

Agressorblue,

In his collective project, Loubial put HALL inside a aluminium tube:

http://forums.eagle.ru/attachment.php?attachmentid=39514&d=1275076883

http://forums.eagle.ru/showthread.php?p=878433#post878433

http://www.checksix-forums.com/showthread.php?t=159606&page=2

Sokol1

Alright, so I ordered some 5/16th tubing and some collars to hold everything together.

The issue now is I don't think the A1302's are sensitive enough. I did some basic testing today, and they appear to have too be to close to the magnets I've chosen (small rare-earth canopy hatch magnets used on RC planes).

That said, Allegros site says the A1321 is out of production, and will be replaced by a new model, A1324 (same sensitivity/input voltage range), but those won't be shipping till October (Allegro is currently filling out orders for the A1321 until then, but only if you were already in the supply chain).

So, should I look for another Hall that has about 5 mV/G of sensitivity and an output of 5v or less, or do I get stronger magnets?

Is not these magnets too small/weak?

Check specs of Honeywell SS495A - SS496A HALL sensor,they are well used too.

Sokol1