Re: 555 50% duty cycle

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Matt,

To guarantee 50% duty cycle, just add a divide by two counter and run the
555 at twice the frequency.  You can get CMOS or TTL counters for less than
a dollar.
--Steve
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, December 21, 2001 7:47 PM
Subject: Re: 555 50% duty cycle


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Fucian-at-aol-dot-com>
>
> In a message dated 12/21/01 8:47:53 PM Eastern Standard Time,
> tesla-at-pupman-dot-com writes:
>
> << Hi Matt,
>
>  With the origninal 555 non-CMOS timer see page 10 of:
>
>  http://hot-streamer-dot-com/temp/LM555.pdf
>
>  Cheers,
>
>     Terry
>
>
>
>  At 07:59 PM 12/2 >>
> Yea, thats what i need.Thanks.I have a Q.In the second formula their looks
to
> be a cursive L.--------[(RaRb)/(Ra+Rb)]cL?n-----Is that an L?What does
that
> mean?CLN?
> Does anyone know of a calculator for 50%duty cycle?
>
> Thanks,
> Matt
>
>