Latching Relay to Flip Flop

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=106633
Printed Date: May 14, 2025 at 8:39 PM

Topic: Latching Relay to Flip Flop

Posted By: fairburnfarms
Subject: Latching Relay to Flip Flop
Date Posted: August 07, 2008 at 3:12 PM

Im hoping to make a standard 4PDT, Dual Coil latching relay into a "flip-flop" relay where i can trigger the relay once to close the circut and then trigger it again to open it up. I am having trouble thinking of a way to do this? anyone done it before?

Replies:

Posted By: i am an idiot
Date Posted: August 07, 2008 at 9:47 PM

You could use the following to trigger your 4PDT relay

Latched On/Off Output Using a Single Momentary Pulse

Similar to the momentary to constant configuration above, we can engage and disengage the latched output with a single pulse from a switch or an output from an alarm or remote keyless entry. The first pulse from the switch will engage the latch. The next pulse from the switch will disengage the latch.
posted_image

Here's the same configuration as the one above that you can use if you do not have any *diodes available and/or only want to use SPDT relays. A negative output from an alarm, remote keyless entry, or other device can be used in place of the switch shown in both of these diagrams.
posted_image

Posted By: hotwaterwizard
Date Posted: August 08, 2008 at 9:49 PM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: August 08, 2008 at 9:53 PM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: August 08, 2008 at 9:56 PM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: 94 gt vert
Date Posted: August 10, 2008 at 2:59 PM

I had the same problem with an access control system I was working on. Turned out to be a very simple solution. I found a relay that changes states everytime it gets power to it. I used a N/O pushbutton to activate it.

I dont know the part number of the relay but I can tell you I got it at L&M electronics. Sorry if I am not much help.

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94 GT Convertable

Posted By: hotwaterwizard
Date Posted: August 10, 2008 at 9:28 PM

posted_image

https://www.mcmelectronics.com/product/28-5115

CEBEK - Flip-Flop Relay Module MCM Part #: 28-5115

Product Details:
With momentary contact at the input, the output relay closes and latches.
Upon a second momentary closure of the same input, the relay opens.
Relay contacts 5A Requires 12VDC, 50mA.
Board dimensions 60mm x 60mm x 30mm.

https://www.mcmelectronics.com/content/productimages/s4/3930919.jpg

https://www.quasarelectronics.com/ci0009.htm

CI0009 - CEBEK - Flip-Flop Relay ModuleElectronic Flip-Flop Relay Board Module
Simple push button operation using either one or two switches to toggle the onboard
mains rated relay on and off.
Use with a single push switch to both start and stop or two push buttons;
One to start and one to stop.

The module has protection against inverse polarity,
indicator output LED and screw terminal connectors.
Requires external 12V dc power supply (Order Code CFE103).

https://www.quasarelectronics.com/images/cebek/ci0009.jpg

Newark Part Number: 36C6492

Manufacturer Part No: 28-5115

Description
Cebek Electronic Circuits Flip-Flop Relay Module,
Relay Contacts: 5 A, Power Requirements: 12 VDC, 50 mA,
Board Dimensions: 60 x 60 x 30 mm,
Features: With momentary contact at the input,
the output relay closes and latches

https://www.newark.com/jsp/search/productdetail.jsp?SKU=36C6492&CMP=AFC-TL10000001

https://fadisel.com/cebek-electronic/automatisms/flip-flop-automatism-cebek-i-9_R_390.aspx

power supply 12 / 60 mA
maximum load 5A
dimensions 61 x 40 x 30 mm.
weight 50 grs.

Information I-9
Automatism with relay allowing any load.
Injecting impulses, for each one, the module will alternately connect or disconnect
the output in a start and stop sequence.
It could operate with a single signal input making one operation per impulse.
On-Off with two inputs one for each operation. Maxi. Load : 5 A.
Power Supply: 12 V. D.C. / 60 mA. (Module FE-103

https://img.icnea.net/Forum/E6001/fotos/I-9-NOU.jpg

User Manual

https://img.icnea.net/Forum/E6001/ftp/I-009_Ang.pdf

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: fairburnfarms
Date Posted: August 12, 2008 at 10:07 PM

thanks for the help. That would work fine

Posted By: hotwaterwizard
Date Posted: August 12, 2008 at 10:40 PM

If you would like to make one yourself here is the Schematic. It is from https://ourworld.compuserve.com/homepages/Bill_Bowden/page9.htm

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !