Frequency Question?
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=63399
Printed Date: May 31, 2024 at 7:44 PM
Topic: Frequency Question?
Posted By: Jasonb61
Subject: Frequency Question?
Date Posted: September 28, 2005 at 2:29 AM
Hello,
I am wanting to set up a 555 timer to send out a pulse once every 20 minutes (approximate)... According to MY math, I should set the frequency to 0.0008333 hertz...
I am new to this, but from what I've gathered hertz is cycles per second... 1200 seconds in 20 minutes... performing 0.0008333 of cycle per second would result in 1 cycle appox. 1200 seconds... Am I correct?
But i've been working on this for a while and its 3:00 am and i could be far off... just let me know... Anyone know the values of the componets? I've yet to figure that out.
Thanks,
-Jason
Replies:
Posted By: KPierson
Date Posted: September 28, 2005 at 10:20 PM
I got the same value. Good luck!
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Kevin Pierson
Posted By: Jasonb61
Date Posted: September 28, 2005 at 11:16 PM
But I did do the equation right? Anyone know what I should set R1, R2, and C1 as?
Thanks,
-Jason
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