relay?

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=8156
Printed Date: July 07, 2025 at 5:16 AM

Topic: relay?

Posted By: demeanor
Subject: relay?
Date Posted: January 14, 2003 at 9:15 PM

Okay, I have a SPDT switch, and in position 1 I need it to turn relay A on. I have relays A, B, C that need powered on 2nd position of the switch (on-off-on). How do I isolate relay A from both B and C in position 1 when in position 2 they all have the same ground?

I know i should use a diode but i'm kinda hazy as to where, and the way the diode will face. I only need relay A to be energized or grounded in position 1 but i need relays A, B, and C to be energized in position 2 of the switch.

Your help and expertise are greatly appreciated!

Thanks in advance for your help.

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It's better to ask a "STUPID" question...than to know a "STUPID" answer. :-)

Replies:

Posted By: the12volt
Date Posted: January 14, 2003 at 9:34 PM

If you are supplying ground to each relay from the switch, connect the output of the switch just for relay A and the anode side of a 1amp diode to the coil of relay A. Connect the cathode side (side with stripe) of the diode to the output of the switch that also connects to the coils of relays B and C. If you need a diagram, just let me know.

Posted By: demeanor
Date Posted: January 14, 2003 at 9:45 PM

pleazzze...send me a diagram if you don't mind, thanks. posted_image

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It's better to ask a "STUPID" question...than to know a "STUPID" answer. :-)

Posted By: the12volt
Date Posted: January 14, 2003 at 10:10 PM

Here ya go.

posted_image

Posted By: demeanor
Date Posted: January 14, 2003 at 10:13 PM

THANKS !!!! posted_image

is there a program you use to be able to draw diagrams like this one?? is it available?

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It's better to ask a "STUPID" question...than to know a "STUPID" answer. :-)

Posted By: the12volt
Date Posted: January 14, 2003 at 10:29 PM

You're welcome. Believe it or not, I used MS Paint to draw it. :) ....o0(Start>Programs>Accessories>Paint)