mini 12v motor

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=119709
Printed Date: May 09, 2025 at 11:44 PM

Topic: mini 12v motor

Posted By: on_campus15
Subject: mini 12v motor
Date Posted: January 28, 2010 at 11:27 AM

hi guys

the problem im having is,

i have a mini 12v motor with possitive or negative to chose from. what i want this motor to do

is turn one way or the other with a switch. ive tried a relay im lost now

any idea??? posted_image

Replies:

Posted By: i am an idiot
Date Posted: January 28, 2010 at 12:46 PM

Posted By: eljefecito
Date Posted: January 29, 2010 at 7:50 PM

Posted By: oldspark
Date Posted: January 29, 2010 at 10:47 PM

Yeah - eljefecito's is preferred (less shorting risk etc).

But both are otherwise equivalent.

Posted By: i am an idiot
Date Posted: January 30, 2010 at 12:38 AM

Actually if you think about it, the diagram I posted has one less terminal that will see a positive voltage. My switch has 4 terminals that may at some time have positive voltage. His diagram has 5 terminals that will at some time see a positive voltage. On the corners of my switch, there are only 2 terminals that hav positive voltage on them. The other diagram will have positive voltage on all 4 contacts.

But as long as there is not an Idiot connecting the setup, he will probably be OK.

Posted By: oldspark
Date Posted: January 30, 2010 at 1:16 AM

Eh? Positive on all 4? So where is ground?
Yep - I've had one of those days too.

I figured yours always has 2 corners +ve.
eljefecito's has no corners +ve when off.

Both are the same when on - 2 corners plus a centre is +ve.

Posted By: on_campus15
Date Posted: January 30, 2010 at 8:07 AM

theres no idiot doing this setup,, everything is bench tested before it goes in my truck

Posted By: oldspark
Date Posted: January 30, 2010 at 10:52 AM

Both suggestions will work.

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