Hall Effect Latching Switch as a Turns Counter Sensor for a Coil Winder

Magnets on a spinning thing near a hall effect latching switch chip make pulses that a counter counts to count the turns the spinning thing spun.

Step 1 Latching Hall Switch?

Sorry, this is not a very complete instructable. Just that all these coils reminded me of what I used for a turns counter when I wound some coils.

A latching hall effect switch turns ON when it sees one pole of a magnet.
Pull the magnet away and it stays ON.
When it sees the other pole of the magnet, it turns OFF.
And stays OFF untill it sees the first pole again.
Repeat.

More info at:
http://www.allegromicro.com/hall/

Comments

[Hycro]

Couldn't you also use the pick-up sensor for a bicycle computer? They switch themselves to the off position, therefore you only need one magnet, and makes it easier to build, and most likely more accurate.

[sisir]

please send me the technical details

[verbero]

(removed by author or community request)

[James (pseudo-geek)]

use it for a milage system maybe?

[James (pseudo-geek)]

mileage (sp?)

[coolguy]

It might be a pain to add, but you could put an eyehole to direct the wire and a servo motor to move it back and fourth to evenly wind the wire. That way it would go across for a certain # of turns, reverse direction, etc... That would be an awesome project to experiment /w. Even a little programming skill could make a function to reset the motor and counter to either side to start new coils.

[Kralc]

I like the Hall sensor imput, and your filter will make it more usable for noisy motors. But what did you use as a counter? I could use a similar device, can't find a mechanical one, looking to electronic type.