using reed switchs

Chilliman

Hi.
i am looking at making my self a alarm system and i wish to use a stamp 2 to control my system, i am thinking of using reed switches but i am no sure the best way to check the state and if i need any other circuit to do this.
i am new at using the stamp and need some help.

chilliman

Mike Green

Reed switches are treated the same as any other switch. Download and read the "What's a Microcontroller?" tutorial for examples of the use of switches with a Stamp. There are also examples in the Basic Stamp Syntax and Reference Manual.

www.parallax.com/tabid/535/Default.aspx

www.parallax.com/tabid/440/Default.aspx

Chilliman

thanks

erco

Reed switches are very reliable for millions of cycles when properly oriented to the magnet you want to trigger them. I bought a variety off Ebay a while back, most are NO SPST types, but I also found several SPDT types with NC contacts that were·quite·useful in a robot·wheel indexing application.

Use a multimeter to test your switch and magnet to optimize the switching function. The·axial·position of the switch is critical to maximum sensitivity, as is the location and direction of travel of the magnet.

My favorite reed switch link·is online sporadically: http://www.dswbrand.com/reed_switch.php

More·good reed switch info at http://www.reed-sensor.com/Notes/General_Reed_Switch_Theory.htm

and· http://www.meder.com/reed-switches3.html?&L=6


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·"If you build it, they will come."

Post Edited (erco) : 7/2/2009 4:52:27 AM GMT