Which Hall sensor for Hit hat?

[Maylord.war]

thanks!
I have two hold hard drisk but not are the same model and brands. If i get the magnet cause any problem? For this sensor are required two or more magnet for a corret use?

Thanks

[JLantz]

No problem at all, Maylord. You will only need to take the magnets from one of them, anyway; each hard drive will have two magnets.

I had this working with only one magnet broken in half. It will depend on how far away the magnet is from the HES wether you need to use more. Your best bet is to experiment with what you have and what location is best to mount the components based on the pedal you have.

[Ken Forgettable]

I think I use the 1321 device but suggest you bias the Hall device to 0V by placing a stationary
north or south pole behind it.

See P.28 of http://www.allegromicro.com/en/Products/Design/hall-effect-sensor-ic-applications-guide/AN27701.pdf

[ignotus]

Ken:

What would be the purpose of doing that? My knowledge of electronics is very basic, and I'd be interested to know

[Ken Forgettable]

If your device works like mine, which I think it does then the output signal only goes to 2.5V (Vcc/2). by biasing you can get a full 0 to 5V output swing.

[JLantz]

Can someone post a screenshot from the Allegro page, FIG. 47? I can't right now, but think it will help the discussion and evolution.

This is an exciting addition that may make the HES solution even better. Thanks for taking the time to read the document, Ken.

[JLantz]

And Ken,

I would like to see some pics of your setup.

I can see the advantage of the increased range with mounting solutions, but is this it? How has this improved your HH pedal response with MD?

[ignotus]

Can someone post a screenshot from the Allegro page, FIG. 47?

Here goes:

fig.47.png

[Ken Forgettable]

I would like to see some pics of your setup.

I'm not at all sure if my setup is suitable in this forum:

Anyway: I use the 1321 which is more sensitive to magnetic flux than the 1302 also, I use Hall effect in preference to PZT for my drums too.
With dual biasing (where the magnets are pushing apart) you get full dynamic range without hot pads *and* you can control head damping ^_^.

[JLantz]

You're using HES for your pads too?!

Details?