Frequency Question?

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Jasonb61

Copper - Posts: 81

Joined: December 01, 2004

Location: United States

Posted: September 28, 2005 at 2:29 AM / IP Logged

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

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: September 28, 2005 at 10:20 PM / IP Logged

I got the same value. Good luck!

Kevin Pierson

Jasonb61

Copper - Posts: 81

Joined: December 01, 2004

Location: United States

Posted: September 28, 2005 at 11:16 PM / IP Logged

But I did do the equation right? Anyone know what I should set R1, R2, and C1 as?

Thanks,

-Jason

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Frequency Question?

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