Pulsed to Steady Output

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=62875
Printed Date: May 12, 2025 at 1:47 PM

Topic: Pulsed to Steady Output

Posted By: Neo_
Subject: Pulsed to Steady Output
Date Posted: September 18, 2005 at 9:55 PM

I am a beginer on this, and I need to simply build one of these:

posted_image

And here are my questions:

1. Am I correct in thinking that aslong as it keeps receiving a pulsed signal, it will output a steady signal? And when it stops recieving a pulsed input, it will stop emiting a steady output?

2. I am not sure exactly which components to use. If anyone could simply link me to radioshack for to the Capacitor, Resistor, and Diode I will be greatly apreciative.

Thank you!

Replies:

Posted By: genehewett
Date Posted: October 16, 2005 at 1:33 AM

You are correct for the first question and the value of the capacitor makes the differance in how long it stays on after the last pulse.

Radio Shack links:

Resistor, Diodes, Relay, and Capacitor.

I didnt see the exact value cap but the link is 20 differant values ask the sales person.

Posted By: Mad Scientists
Date Posted: October 16, 2005 at 10:49 AM

Hey look!! an RC circuit!

the relationship between the resistor and capacitor will determine how long the relay stays energized. I would breadboard the circuit to play with the values to determine what values to use.. you also have to look at how much power the relay coil uses. You could also use the RC circuit to drive a transistor to actuate the relay.

Watch how long it takes the circuit to deenergize the relay..

Jim

Posted By: hotwaterwizard
Date Posted: October 19, 2005 at 11:40 PM

Like This?

posted_image

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

Posted By: hotwaterwizard
Date Posted: October 19, 2005 at 11:52 PM

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

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