finding post, 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=100244
Printed Date: May 14, 2024 at 12:05 AM

Topic: finding post, latching relay

Posted By: seeker1
Subject: finding post, latching relay
Date Posted: December 20, 2007 at 1:13 AM

Acouple weeks ago I was searching posts looking for a discrete approach for a latching relay w / momentary trigger. I found 1 using a ZXMP6A13F P-channel Mosfet and a CD4027B master J K flip flop. Now I can't find any more. As i remember this setup took a momentary pulse to trigger the flip flop and would remain on until triggered to off by a door switch. Does anybody know which post this was or how to set this up? I want to toggle on / off with my remote & trigger to off when the door opens.

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Only the strong survive.
Eat the weak.

Replies:

Posted By: dualsport
Date Posted: December 21, 2007 at 10:38 PM

Boy, you sure remembered a lot of details from that post, figured if you could remember all that, the link should have been cake- especially for a seeker posted_image

latching relay

Posted By: dualsport
Date Posted: December 21, 2007 at 10:45 PM

Not sure if that circuit matches what you're looking for though, that one toggles the output every time a pulse is received. Sounds like you want something with another input to reset the output (when you open the door), along with a pulse input to toggle it on and off.
You can use the set or reset inputs on the flip flop to do it, should be easy enough.

Posted By: ralphtonka
Date Posted: December 21, 2007 at 10:59 PM

simple 12v mechanical latching relay (electronics wholesaler $4), use door trigger w/ diodes to trip off, & pulses from unit to toggle

Posted By: hotwaterwizard
Date Posted: January 06, 2008 at 1:37 AM

Here is a simmular circuit.

posted_image

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

Posted By: hotwaterwizard
Date Posted: January 06, 2008 at 1:48 AM

Here is another one.

https://www.circuit-innovations.co.uk/push_switch.html

posted_image

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