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 Posted - April 22 2013 : 11:27:29 PM
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I'm wanting to use a reed switch for a special project. Is there such a thing as a DPDT normal open reed switch or could 2 SPST NO reed switches be used?
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Posted - April 23 2013 : 9:17:02 PM
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The questions you ask. I wonder what kind of things you are building.
I know very little about reed switches. Have not heard of DPDT variety.
I think putting the 2 spst together would work. Depends on what you are trying to do.
Unspoken expectations are premeditated failures.
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Posted - April 23 2013 : 10:50:14 PM
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Make a motor go forward and then reverse once more.
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Posted - April 24 2013 : 3:23:37 PM
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Mr Justin,
Generally a reed switch will not carry enough current to power a HO engine.
You could use the reed switch to activate a DPDT relay and accomplish your goal.
Regards,
John
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Chaotic action is preferable to orderly inaction. <> Will Rogers
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Posted - April 24 2013 : 3:44:44 PM
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It's a small small motor with a very light load. How would I wire up this idea of yours?
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Posted - April 25 2013 : 1:20:37 PM
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I'm using a AA battery and radio shack has a 5 VDC DPDT relay. Will a AA still work?
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Posted - April 26 2013 : 10:04:17 AM
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Mr Justin,
Here is a circuit that may be a solution.
You will need both a normally open and a normally closed reed switch.
You will also need a 3PDT or 4PDT relay with 2 to 5 Amp contacts.
The 12vdc power supply for the relay can be a small wall wart.
The power pack will be needed to control the speed of the train.
This is a simple control system, so speed and the location of the reed switches
may need adjustment
There are a few commercial systems that are designed for this function. I am not sure who builds them.
you could use a 5 volt relay, but you will need 3 or 4 batteries for power
Regards,
John
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Untutored courage is useless in the face of educated bullets. <> Gen George S. Patton
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Posted - April 26 2013 : 12:13:52 PM
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EEK! I wanted to cram this into a 50' stock car with other stuff in there. Not sure if it's gonna fit now!
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - April 26 2013 : 3:46:01 PM
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Mr Justin,
I guess I do not understand the goal of this project. More detail might be helpful. Bear in Mind a reed switch is only switched while in a magnetic field. It does not switch on and stay on when the Magnet is moved.
The supplied circuit was designed to run a single train on a track that will auto reverse at both ends of the track.
Regards,
John
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We can lick gravity, but sometimes the paperwork is overwhelming. <> Wernher von Braun
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Posted - April 26 2013 : 3:48:04 PM
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It might have helped from the outset if you would just tell us what you're trying to build.
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Posted - April 26 2013 : 3:50:36 PM
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OK, my secret build is a my version of the Lionel Giraffe car as I figured electrically operating the giraffe than mechanically would be better or worse.
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Posted - April 26 2013 : 4:19:23 PM
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You could use a solenoid to move the giraffe. Or you could use a live miniature giraffe and train him to duck.
Or you could just buy a Lionel giraffe car.
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Posted - April 26 2013 : 4:55:40 PM
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LOL! The car is cheap because you never do find the activator or tall-tales. Just trying to think of a small enough yet strong solenoid and how I could use it. Thinking like a e-unit coil I could buy or pull from a clunker and make a spring loaded plunger mechinism.
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