DTMF relay

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=68579
Printed Date: May 06, 2025 at 3:14 PM

Topic: DTMF relay

Posted By: r3dlin3
Subject: DTMF relay
Date Posted: December 17, 2005 at 7:41 AM

Hey guys, I got a question and I hope you can answer it.

A long time ago I viewed on someone’s blog how they build a DTMF relay that they hooked up to there phone to do a few things.

I’m wondering if anyone knows how to build a DTMF relay circuit?

My reason for this is that I have a spare phone, actually my work phone that sits in my car 24/7 anyhow. If I could get this relay I could call my work phone (it’s got a phone filter to auto answer on for my personal phone. And forward all other incoming to VM or my personal phone) and if I hit any number it would trigger a relay to remote start, roll up windows, arm, disarm etc.

Any help with this would be great.

thanx

Replies:

Posted By: geepherder
Date Posted: December 17, 2005 at 8:34 AM

I found this on Google:

https://www.boondog.com/%5Ctutorials%5Cdtmf%5Cdtmf.htm

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My ex once told me I have a perfect face for radio.

Posted By: r3dlin3
Date Posted: December 17, 2005 at 8:46 AM

thanx :)

Posted By: techguy688
Date Posted: December 26, 2005 at 3:48 PM

This is a DTMF board that will work.

https://www.dschmidt.com/dtmf.html

DTMF Activated Relay (part # DTMFRLYB-T)

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Just because you've done something for a long time doesn't mean you're any good at it.
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