[time-nuts] Announcing the TAPR "FatPPS" Pulse Stretcher

[Normand Martel]

I've made a such pulse stretcher to render the 1ms
pulse from a CMC Superstar and the 10µS pulse from a
Trimble Lassen SK8 visible via an L.E.D. by using a
simple 555 timer configured in a monostable fashion.

Sure it is not nanosecond precise and i'm not sure AT
ALL it will react to a 20ns pulse, but for a visual
monitoring, it is perfect (pulse stretched to about
30ms).

73 de Normand VE2UM
Montreal, QC Canada
--- John Ackermann N8UR <jra at febo.com> wrote:

> Is your PPS signal too short to trigger your serial
> port?  Is that
> what's troubling you, Bunkie?
> 
> If so, the new TAPR FatPPS is the answer you've been
> looking for...
> 
> The FatPPS is a DB-9 "dongle" that implements a
> pulse stretcher.  Input
> signals as short as 20 nanoseconds produce an output
> pulse about 30
> milliseconds wide (the width can be changed by
> changing a few component
> values).  It can be powered from the host computer's
> serial port, and so
> requires no external connections at all.  It works
> with either TTL or
> RS-232 level input pulses (the output is always TTL
> level), and can
> invert input or output pulse polarity if needed.
> 
> I designed the FatPPS because the ~20 microsecond
> wide PPS signals from
> several of my time sources (like the Z3801A GPSDO,
> and HP frequency
> standards) was too short to reliably work with the
> serial ports on my
> NTP servers.  Hopefully, it will be of use to some
> of you as well.
> 
> The FatPPS is available only as a fully assembled
> and tested unit, and
> is shipping now.  The price is $44 for TAPR members,
> and $49 for
> non-members.
> 
> There are more details, and you can place an order,
> at
> http://www.tapr.org/kits_fatpps.html.  You can view
> the installation and
> operations manual (which is still a work in
> progress) at
> http://www.tapr.org/~n8ur/FatPPS_Manual.pdf.
> 
> Thanks for the interruption.
> 
> John
> 
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
>
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com