Project, fans on a timer, never used relays
Printed From: the12volt.comForum 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=143587
Printed Date: May 03, 2024 at 4:05 PM
Topic: Project, fans on a timer, never used relays
Posted By: ulterior_motive
Subject: Project, fans on a timer, never used relays
Date Posted: October 01, 2017 at 2:04 AM
Hey guys, i know this forum is for cars, but, i have a dilemma,
this is the project at hand, I need to turn on some fans.
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Now the story, The fans are going to be on a timer operating at 12v, and the fans will be on a set schedule.
What i need to do is the following, when the Humidity sensor engages due to low humidity, i need a signal sent to the FAN assembly to turn on.
BUT, i cant power the fans when the timer is in the off mode. So, what i was going to do was run a second power wire from the 12v and wire a second positive/negative to each fan. (BLUE WIRE IN IMAGE)
So, here is why im here,
I think i need a relay,
I need a relay which feeds off the bottom wire (24v) and switches the 12v line (the blue wires) to turn on.
I understand I'm using a 24v trigger to power the 12v fans, i want to add that i do have the means to turn that 24v to a 12v so if 24v is a problem then don't worry about it.
I also, want to add a secondary Relay to send a signal to the TIMER line to not engage when the blue line has engaged. For that i searched the forums and found this.
https://www.the12volt.com/installbay/forum_posts.asp?tid=102363
Will that work for my needs? ANY help is greatly appreciated.
this is the project at hand, I need to turn on some fans.
Now the story, The fans are going to be on a timer operating at 12v, and the fans will be on a set schedule.
What i need to do is the following, when the Humidity sensor engages due to low humidity, i need a signal sent to the FAN assembly to turn on.
BUT, i cant power the fans when the timer is in the off mode. So, what i was going to do was run a second power wire from the 12v and wire a second positive/negative to each fan. (BLUE WIRE IN IMAGE)
So, here is why im here,
I think i need a relay,
I need a relay which feeds off the bottom wire (24v) and switches the 12v line (the blue wires) to turn on.
I understand I'm using a 24v trigger to power the 12v fans, i want to add that i do have the means to turn that 24v to a 12v so if 24v is a problem then don't worry about it.
I also, want to add a secondary Relay to send a signal to the TIMER line to not engage when the blue line has engaged. For that i searched the forums and found this.
https://www.the12volt.com/installbay/forum_posts.asp?tid=102363
Will that work for my needs? ANY help is greatly appreciated.