Magnetic Sensors
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Posts: 46,084
Hi Gang:
I am trying to tie a switch into the stamp that changes state when a magnet
is passed by it. The magnet will be up to 3" away and there will also be a
1" thick aluminum wall in this 3" space. The magnet in use will probably
weigh about 1/2 lb. and will have a fairly strong field (Amp-Turns at this
time are unknown).
Do reed switches work well in this type of application? Failing that will
the Cherry/Micronas sensors listed in Digikey do the trick? I know there are
some commercial sensors out there that will work but they are bulky and
expensive ($80 + and that is the vendor's wholesale price never mind the
mark up!). Regardless of what is used, I know that I will need a series
resistor and an optocoupler to interface this doo hickey into the BS-2.
Any other suggestions or readily available products that will work in this
application are also welcome. Thanks in advance for your assistance.
Gerry Shand
gwshand@c...
(780) 471-0470
I am trying to tie a switch into the stamp that changes state when a magnet
is passed by it. The magnet will be up to 3" away and there will also be a
1" thick aluminum wall in this 3" space. The magnet in use will probably
weigh about 1/2 lb. and will have a fairly strong field (Amp-Turns at this
time are unknown).
Do reed switches work well in this type of application? Failing that will
the Cherry/Micronas sensors listed in Digikey do the trick? I know there are
some commercial sensors out there that will work but they are bulky and
expensive ($80 + and that is the vendor's wholesale price never mind the
mark up!). Regardless of what is used, I know that I will need a series
resistor and an optocoupler to interface this doo hickey into the BS-2.
Any other suggestions or readily available products that will work in this
application are also welcome. Thanks in advance for your assistance.
Gerry Shand
gwshand@c...
(780) 471-0470
Comments
directly connected with Stamp (just a pull up or down resistor will be
needed), without any interface.It is very cheap and easy to try.
Another approach is use a Hall effect swicth chip, but this probably
will additionaly require an amplifier.
ACJacques
Shand, Gerry W., Celanese/CA wrote:
>
> Hi Gang:
>
> I am trying to tie a switch into the stamp that changes state when a magnet
> is passed by it. The magnet will be up to 3" away and there will also be a
> 1" thick aluminum wall in this 3" space. The magnet in use will probably
> weigh about 1/2 lb. and will have a fairly strong field (Amp-Turns at this
> time are unknown).
>
> Do reed switches work well in this type of application? Failing that will
> the Cherry/Micronas sensors listed in Digikey do the trick? I know there are
> some commercial sensors out there that will work but they are bulky and
> expensive ($80 + and that is the vendor's wholesale price never mind the
> mark up!). Regardless of what is used, I know that I will need a series
> resistor and an optocoupler to interface this doo hickey into the BS-2.
>
> Any other suggestions or readily available products that will work in this
> application are also welcome. Thanks in advance for your assistance.
>
> Gerry Shand
> gwshand@c...
> (780) 471-0470
>
>
>
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