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???
04/07/05 23:36
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#91228 - door lock diagram
Responding to: ???'s previous message
Hello Joshua,

You can interface your 80C51 to the solenoid using the below diagram
(http://members.aol.com/cpu8052/doorlock.gif). You have to activate on of your port pins to logical low for about 1/2 second which will pull in say relay 1. The solenoid will pick up. Activating the other port pin to a logical low for about 1/2 second will pull in say relay 2. The solenoid will actuate the reverse way because the current flow thru it is opposite.

Good Luck,

Regards,

Charles Bannister
REFERENCE
http://www.the12volt.com/doorlocks/page3.asp





List of 29 messages in thread
TopicAuthorDate
Driving 12V Relay W/ 8051            01/01/70 00:00      
   Ammended Image Post            01/01/70 00:00      
      that get you nowhere.            01/01/70 00:00      
   A few things            01/01/70 00:00      
      No, that is not so.            01/01/70 00:00      
         an 8751, perhaps            01/01/70 00:00      
   Pull Ups and Base Current            01/01/70 00:00      
      ULN2003            01/01/70 00:00      
   door lock diagram            01/01/70 00:00      
   One more method...            01/01/70 00:00      
      Why not use 2N7000            01/01/70 00:00      
         2N7000 Not Good By Itself            01/01/70 00:00      
            You have a point            01/01/70 00:00      
               FET solution            01/01/70 00:00      
                  Elegant?            01/01/70 00:00      
                     True..            01/01/70 00:00      
               It Can Be Small            01/01/70 00:00      
                  Zetex            01/01/70 00:00      
                  Could it be smaller?            01/01/70 00:00      
                     Think so.            01/01/70 00:00      
                     Onboard Resistors            01/01/70 00:00      
                     Digital transistors            01/01/70 00:00      
                        Missed            01/01/70 00:00      
      an added note            01/01/70 00:00      
         solved by Allegro            01/01/70 00:00      
            part number for Allegro chip?            01/01/70 00:00      
               take your pick            01/01/70 00:00      
                  I missed a few            01/01/70 00:00      
            It was a note :)            01/01/70 00:00      

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