momentary to constant on
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=131648
Printed Date: May 15, 2025 at 6:08 AM
Topic: momentary to constant on
Posted By: jsyslak
Subject: momentary to constant on
Date Posted: June 18, 2012 at 10:58 PM
I have built this relay posted on the 12volt site:
I am using a Momentary switch which sends a 5v positive pulse. My question is how do I get the same switch to send the positive pulse to turn the circuit off? I am trying to use a stock Mercedes switch for my application. Need help, I'm new to this.
Replies:
Posted By: howie ll
Date Posted: June 19, 2012 at 6:33 AM
Cheaper to use a latching relay for up to 10amps, no coil current draw whilst it's on.
Omron dual coil latching relay under $5 from Mouser or Farnell, constant pos(+) to one side of coils and alternative neg (-) switching supplied from the switch.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: jsyslak
Date Posted: June 19, 2012 at 7:14 AM
I went on Mouser Electronics website and there are many options for this. Any chance you could post part number and wiring diagram. Thnx
Posted By: howie ll
Date Posted: June 19, 2012 at 7:42 AM
I got this from the UK RS components site but Mouser, Farnell, RS = the same company.
5amp/12VDC G6BK-1114P-US-DC12
10amp/12VDC G6CU-1114P-US-DC12
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: June 19, 2012 at 7:46 AM
Here's a layout, note the coils are polarised.
CDD_latch.bmp------------- Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: June 19, 2012 at 11:29 AM
I just realised you wanted POS (+) switching all you have to do on those Omron relays is to ground both (-) sides of the twin coils and individually feed the (+) sides from your switch. Look at this.
7E3_latch.bmp------------- Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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