relay with negative output and time delay
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=133934
Printed Date: May 28, 2024 at 9:27 PM
Topic: relay with negative output and time delay
Posted By: protomorph
Subject: relay with negative output and time delay
Date Posted: March 26, 2013 at 10:45 PM
Hi, I've been looking over the forums for a quite a while and finally decided to make an account since I have a question of my own.
I was looking to wire up a circuit that will take a positive constant output and send a negative output then stop, short pause and send a second negative constant output.
Not to sure on where to start, but I'm thinking I will need 2-3 relays and probably capacitors and resistors somewhere also.
Thanks!
Replies:
Posted By: oldspark
Date Posted: March 28, 2013 at 6:24 AM
Maybe a couple of DEI 528T relay modules?
Posted By: howie ll
Date Posted: March 28, 2013 at 3:22 PM
"positive constant output and send a negative output then stop,"
Could explain the circuit or what it means, OR do you mean constant input?
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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: oldspark
Date Posted: March 28, 2013 at 7:42 PM
Yes - I was wondering that.
I assume it's a rising constant that is the trigger, and I wondered what initial negative period (0V aka GND; off) was required - maybe an RC "differentiator" circuit into a 528T might do?
But due to the lack of detail of both pulse durations etc, I thought the OP could work it out.
Posted By: howie ll
Date Posted: March 28, 2013 at 7:56 PM
I think this is a case of we know the answer what exactly is the question?
-------------
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: protomorph
Date Posted: March 30, 2013 at 10:51 PM
I'm looking to bypass the new pioneer e-brake setup where you have to have it see ground then open circuit then see ground again. I don't want to do the easy way out and buy a module I'd rather try and do it myself, but I'm not too experienced with relays, diodes, and capacitors just yet.
Posted By: howie ll
Date Posted: March 31, 2013 at 1:24 AM
The easy way is a 528t module, or you could assemble and build a Velleman kit with modifications.
As a pro it's easier for me to use a 528t, it isn't cost effective to build something.
There are timed circuits in the relay section but you would have to modify some of the components.
-------------
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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