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[aprssig] RS232 sniffer

Ray Wells vk2tv at exemail.com.au
Fri Feb 15 23:58:22 UTC 2008


Andrew,

Is this of any use .... http://www.marcspages.co.uk/tech/3104.htm

Ray vk2tv

Andrew Rich wrote:

> Hi,
>  
> I am thinking of putting together an RS232 sniffer for the shack.
>  
> Pretty simple, just some LED's for activity.
>  
> What would be the best way ?
>  
> Can compartors be used to show activity ? I am looking for lots of 
> them , hence lots of pins to watch.
>  
> We have break out boxes, but they never really seem to have all the 
> connections we want, for a CRO etc
>  
> Ideas ?
>  
> A circuit to switch on with a +1.2 or greater volts
>  
> Not sure what to do about the -ve swing. or even bother - activity is 
> the aim.
>  
> MAX232 only has 1/2 in it what I want to do
>  
> ----------------------------------------------------------------------------
> Andrew Rich VK4TEC
> vk4tec at people.net.au <mailto:vk4tec at people.net.au>
> http://www.tech-software.net <http://www.tech-software.net/>
>  
>  
>  
>
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