I have found that a piezo sounder, a ceramic disk with two leads for making beepers works quite well for very short pulses. For a very short period charge flows into this device, which is a capacitor, and for that duration its dimensions are changed, and when it reverts to its original state the seismic disturbances echo around the device making a very clear click.
cheers, Neville Michie > On 21 Apr 2020, at 12:25, Taka Kamiya via time-nuts > <[email protected]> wrote: > > Maybe everyone but I knew, but I just did this and found it useful. > 1 pps signal from some GPS are notoriously narrow and difficult to sync on > and see on scopes. LED will barely light if some kind of stretcher is not > used. If your purpose is ONLY to see if it's there or not, hook up a small > speaker, earphone, amplified or not, and you can hear the tick-tick sound. > > I like DIYing and many times, I wonder if pps distribution circuit is > working. I can tell a very short pulse that will barely register on LED is > clearly audible. > I thought I'd share. > > --------------------------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
