Re: 555 50% duty cycle

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Matt,

"ln" is a "natural logarithm function".  Window's calculator has it above
"log" in the scientific mode as "ln".

Radio Shack has the CMOS version #276-1718 for $1.49.  With the CMOS
version the frequency is just 0.71/RC.

Cheers,

	Terry


At 09:21 PM 12/21/2001 -0500, you wrote:
>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
>