Yet again...latching 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=26188
Printed Date: May 14, 2024 at 3:03 AM
Topic: Yet again...latching relay
Posted By: caifansc
Subject: Yet again...latching relay
Date Posted: February 09, 2004 at 11:03 PM
Hi people....not to sound crappy, but this site does RULE! I all of a sudden found a couple more 'projects' for my car. Regarding my question...Im trying to wire an accessory (30A fan) to a pre-existing momentary switch on my dashboard. I have everything wired up as I want it but I need a latching relay to hold the current from the switch to the fan. Basically, I want the fan to come on when i push the momentary switch AND STAY ON, until i push on the same switch again to cut the fan off. The switch receives/allows to pass (once pushed) 12 V and the fan has a 30A fusable link, so im assuming a 30 amp relay will hold it nicely. Can anyone direct me to an appropriate latching relay for my application? Also, i searched and searched because i was under the impression that the latching relay i was looking for looked like your average 30 power relay, are there any of those or are all latching relays like the ones made for computer boards? Thanx in advance...i plan to browse this thing and suck the juice of knowledge!
Replies:
Posted By: REDRABIT69
Date Posted: February 11, 2004 at 1:59 AM
https://www.the12volt.com/relays/page5.asp
(second diagram down)
Thats using 2 normal 12v relays
Posted By: GMC4x4Guy
Date Posted: February 11, 2004 at 2:07 AM
You can also get a DEI 611T latching relay.
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"Drive it like you stole it"
Posted By: caifansc
Date Posted: February 11, 2004 at 10:30 AM
Redrabit69: Whats up with that diode? Am i supposed to get a diode or get a relay with a diode already in it? GMC4x4Guy: where would i go about getting that latching relay? Would it come with a wiring diagram to help me set it up? Also, aruond here I saw a diagram using a latching relay that still used a regular 12v relay....do i need both or just by wiring it with the latching relay be enough? Thanx for your replies guys
Posted By: caifansc
Date Posted: February 11, 2004 at 10:40 AM
Redrabit69: I was reading the description on top of the diagram you said, and it sais that to cut it off I would need another switch? I dont know if Im good just using the one switch I want to use, or if on top of that I need another one....which would defeat the purpose of what Im trying to do. If you can clarify me on the issue i would much appreciate it.
Posted By: Teken
Date Posted: February 11, 2004 at 6:13 PM
caifansc wrote:
Am i supposed to get a diode or get a relay with a diode already in it?
If you are using a standard SPDT relay. You will have to add the diode in place as it is illustrated in the diagram on this site.
Total costs to you would be under $2.00 USD
Regards
EVIL Teken . . .
Posted By: GMC4x4Guy
Date Posted: February 11, 2004 at 8:26 PM
I've bought the 611T on Ebay before for about $9. That's the only place I've found it but I'm sure there's other places.
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"Drive it like you stole it"
Posted By: REDRABIT69
Date Posted: February 12, 2004 at 12:19 AM
yeh the diode goes across the coil of the relay to stop voltage spikes, the stripe side of the diode connects to the positive side of the coil (don`t forget them, I made a remote starter and forgot the diodes, took me months to figure out why it only worked 80% of the time!)
yeh from the sounds of it you would need another switch...is it a factory car switch, or is it one someone has put in for something else? Personally I`d take it out and put in a toggle switch, then you`d only need one relay
Posted By: RufNUSD
Date Posted: February 15, 2004 at 9:24 PM
The latching relay setup using 4 relays and 2 diodes on this site works like a champ! I use it for my neons. One push on... one push off. Mel
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Someone pass me that bottle.
Posted By: caifansc
Date Posted: February 15, 2004 at 10:19 PM
Does any body know where I can get a relay board? For example, if I was to use the 4 relay set up, i'd like to have all relays sitting on a board...just to keep things ordered and clean. Any suggestions?
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