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wiring Relays and diodes


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domas 
Member - Posts: 3
Member spacespace
Joined: March 22, 2005
Location: United States
Posted: March 25, 2005 at 6:02 PM / IP Logged  
Can anybody help me wire  2 relays , 2 diodes , switch 0n-0ff-on  and 1 motor so that  when switch in ON position motor rotates in  direction A and when switch in other ON position motor rotates in  dirrection B. Relays have to be wired the same way, and not using 87A, and 30, 85 to ground. 2diodes have to used.
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auex 
Platinum - Posts: 5,041
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Joined: December 23, 2002
Location: Arizona, United States
Posted: March 25, 2005 at 6:36 PM / IP Logged  
Why so many specifics? Also not using 87A you can't do a reverse polarity relay system. I say you are screwed unless the motor is self grounding. Also technically if the relays have to be wired the same way it won't work regardless because they will go to the same wires.
Why do I smell homework?
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domas 
Member - Posts: 3
Member spacespace
Joined: March 22, 2005
Location: United States
Posted: March 25, 2005 at 8:18 PM / IP Logged  

thank you, auex, anyway

well, it's my small project.  i think it's possilble, by using 2 diodes. Now i'm trying to find out. If i get an answer i'll let yuo know.

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auex 
Platinum - Posts: 5,041
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Posted: March 25, 2005 at 8:48 PM / IP Logged  
Is there any reason why you can't use 87A?
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domas 
Member - Posts: 3
Member spacespace
Joined: March 22, 2005
Location: United States
Posted: March 26, 2005 at 8:51 AM / IP Logged  

I know that there's 2 ways actually you can do that , but i just wanna find out how to do with 2 diodes. But if i don't figure it out i'll always can use 87A. Thanks, it were just only  you who responded to my question.

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ff-mike 
Copper - Posts: 199
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Joined: November 15, 2004
Location: United States
Posted: March 30, 2005 at 12:36 PM / IP Logged  
Why don't you just use a DP-DT-CO switch and screw the rest?

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