I would like to put a 3-pronged hall effect sensor in the trigger frame of my paintball gun. I would like it to trip at 70 gauss. What problems might I have? Does anyone know where I could get HES to work for this? Thanks.

 

Responding to E99Beekz's query:

Search web for Hall-Effect Sensor manufacturers such as Cherry, Optek, Panasonic. Others may already have hall-effect sensor assemblies such as the one you seek.

Regards,
Phil Corso, PE
Boca Raton, FL
[[email protected]] ([email protected]) {[email protected]}

 

Hi

Not sure if your after a switching type hall, increase on magnetic strength or magnetostrictive type. You need to simply search hall sensors on the web as the types and applications are vast. Start with the links on this site at the page bottom.

Since you have the magnet picked – my guess would be you are counting activations so why not use a tiny battery, as weight is an issue, and a reed switch?

HAS – is that a power control of some type?

Thanks Bob Hogg

[email protected]

 

There are three types of hall sensor that I know about, linear, latching and non latching.

A latching Hall sensor would be best for you aplication if when you pull the trigger both poles of the magnet go past the sensor.
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http://international2.farnell.com/Search/level_5.jhtml?PRODID=6397&SKUID=4336

 

A latching Hall sensor would do the trick if the magnet is mounted so that when the trigger is pulled both the N and S pole of the magnet pass over the Hall Sensor. (So that when you pull the trigger the N pole is last past the sensor so it will latch on) Then when the trigger is released the N pole goes past the sensor followed by the S pole so the sensor latches off.

Hall sensors come in many types:

http://international2.farnell.com/S...tml?_DARGS=/common/prodsearchform_inone.jhtml

http://international2.farnell.com/S...tml?_DARGS=/common/prodsearchform_inone.jhtml

As an alternative (Which would probably be even lighter & cheaper and easier to source) is to use an optical switch.

http://international2.farnell.com/Search/level_5.jhtml?PRODID=21442&SKUID=19381

Just putting bit of metal or black plastic between the slots will turn the transistor off.
You can find these in old floppy disk drives and it is more likely to be at your local electronics shop or surplus store.

Nicholas

 

For more information on Hall Sensors & how they work:

http://www.sensorland.com/HowPage046.html