Real quickly, I am by no means an expert on this subject, but I am currently doing a hall sensor mod to my TM Elite rudders that I am intergrating into my multi-use desktop sim panel. I am adding dual toe brakes axis. I am using HE sensors not for their superior sensitivity and accuracy, but for their tiny size compared to a potentiometer. They will fit in an area MUCH smaller and less obtrusive than a pot. Besides, I dont want to have to go taking the pedals apart, just to clean the pots every now and again. Dust and dirt have almost no effect on a HE sensor, unless it is made up of metal iron filings.
On to offering what might be a solution to, and hopefully helping you find an answer to your problem.
First of all, some of the older controller boards in joysticks, HOTAS and other controllers, use a variable resistance as the reference and to operate, and not a variable voltage. Hall effect sensors send a variable voltage to the controller interface. If your CI board operates on a variable resistance, then the HE sensors will not work. At least not without a circuit to convert the variable voltage to a variable resistance. It can be done, but is above my expertise and not neccesary to what I am doing.
You have already stated that you had it wired wrong, so you may already have found your solution, but for clarity I am including the info here for others.
The thing is, and I can not speak specifically to the Allegro 1321. but with the Alegro 1302s that I am using, to wire it up, you can not do a one to one wire swap. A visual may help, so there is a picture of the HE sensor I am using HERE
. The swiper on pots is by in large the middle wire. With the 1302s. The swiper, or reference voltage that the controller sees and uses to determine the axis position, is the outside lug.
The ground and 5v are the middle and one of the outside lugs respectively, the reference is on the other outside lug. If you are trying to use the center lug, you will never get it to work. As a matter of fact, you can blow the HE sensor up by wiring it the wrong way. I hope that is not the case, else you may be trying to wire a component, that is already blown.
I am using the BU0836A from Leo Bodnar, and am starting construction of my desktop sim control panel in earnest, including mods to existing controllers which will be interfaced through the new sim control panel.
I will be posting a log including photos and detailed descriptions after I am finished with the basics of the panel.