Momentary Output When Power On/Off

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=145541
Printed Date: May 05, 2025 at 7:58 AM

Topic: Momentary Output When Power On/Off

Posted By: 12vlost
Subject: Momentary Output When Power On/Off
Date Posted: July 26, 2019 at 5:49 PM

Hi everyone, thanks for the help in the past ...
Looking to wire a garage door opener using a mains outlet socket using an app on my phone-
Intend to, take it down to 12v using a psu and hopefully wire relays to send a momentary pulse when 12v is supplied then another momentary pulse when 12v is removed, doable?
TIA

Replies:

Posted By: i am an idiot
Date Posted: July 26, 2019 at 8:52 PM

https://www.the12volt.com/relays/relaydiagrams.asp

Diagram 5 and diagram 56 with the outputs paralleled and diode isolated.

Posted By: 12vlost
Date Posted: July 27, 2019 at 9:02 AM

Great thanks

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