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Help needed designing square wave osc (555)

by Kasterborus <kasterborus@[EMAIL PROTECTED] > Jul 9, 2008 at 08:12 AM

Hi, I've been trying to calculate "standard" values that would make me
a 555 R1/R2/C1 square wave oscillator with a 50% duty cycle operating
at close to 30Hz.

Can someone assist? My numbers come out with "odd" component values.

I need a 30Hz and 60Hz oscillator eventually.
Ideally a variable oscillator that could be set to 30 or 60 would be
ideal.

Thanks,
Dave
 




 15 Posts in Topic:
Help needed designing square wave osc (555)
Kasterborus <kasterbor  2008-07-09 08:12:04 
Re: Help needed designing square wave osc (555)
John Popelish <jpopeli  2008-07-09 12:27:58 
Re: Help needed designing square wave osc (555)
Rich Grise <rich@[EMAI  2008-07-09 17:25:17 
Re: Help needed designing square wave osc (555)
John Popelish <jpopeli  2008-07-09 14:57:22 
Re: Help needed designing square wave osc (555)
John Fields <jfields@[  2008-07-09 11:39:02 
Re: Help needed designing square wave osc (555)
Rich Grise <rich@[EMAI  2008-07-09 17:23:45 
Re: Help needed designing square wave osc (555)
Jasen Betts <jasen@[EM  2008-07-10 10:32:14 
Re: Help needed designing square wave osc (555)
Kasterborus <kasterbor  2008-07-11 06:38:43 
Re: Help needed designing square wave osc (555)
Baron <baron.nospam@[E  2008-07-11 16:03:36 
Re: Help needed designing square wave osc (555)
Kasterborus <kasterbor  2008-07-11 08:50:56 
Re: Help needed designing square wave osc (555)
Baron <baron.nospam@[E  2008-07-12 20:25:49 
Re: Help needed designing square wave osc (555)
Michael Black <et472@[  2008-07-11 12:30:02 
Re: Help needed designing square wave osc (555)
Kasterborus <kasterbor  2008-07-11 10:14:48 
Re: Help needed designing square wave osc (555)
NoSpam@[EMAIL PROTECTED]   2008-07-12 12:28:05 
Re: Help needed designing square wave osc (555)
"starfire" <  2008-07-11 12:36:23 

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