semi auto aerial

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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=90358
Printed Date: May 08, 2025 at 2:37 PM

Topic: semi auto aerial

Posted By: quazzar
Subject: semi auto aerial
Date Posted: February 11, 2007 at 10:17 PM

Not sure if this is the right forum but, I want to turn my semi auto aerial to a full auto arial using a simple timer cicuit with switching relay, the manual switch crosses over the +/- wires depending wether it goes up or down, can any one suggest a diagram for this circuit and parts that might be required?

Replies:

Posted By: hotwaterwizard
Date Posted: February 11, 2007 at 10:44 PM

How long up and how long down?

Here is what I came up with so far. Push button control.

posted_image

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

Posted By: quazzar
Date Posted: February 12, 2007 at 12:23 AM

Wow, thanks for the quick reply, but doh! I forgot to mention I would like it to be activated the radio via single wire feed +12v ie: power on, goes up (3 secs) and power off, goes down (3 secs)

I know this can be acheived by getting a new full auto aerial, but I would like to keep the origininal one that was fitted by the factory.

Posted By: hotwaterwizard
Date Posted: February 12, 2007 at 1:05 AM

Here is the Fully Automatic Schematic I created from scratch ( UNTESTED )

posted_image

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

Posted By: quazzar
Date Posted: February 12, 2007 at 1:07 AM

Many Thanks!!!!

Will try it out and let you know how it went

Posted By: hotwaterwizard
Date Posted: February 12, 2007 at 1:12 AM

Use 47 uF instead of the 470 on the 2 transistors for 3 seconds.

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

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