Hi A lot also depends on what sort of voltage / power the speaker is expecting. If it’s a high impedance voice coil gizmo things aren’t going to be as easy as with a piezo gizmo designed to work in a 1.3V battery powered greeting card.
Where did I leave that 10KV output amplifier ….. should be easy to find …. :) Bob > On Apr 22, 2020, at 5:59 AM, Dana Whitlow <[email protected]> wrote: > > The thing is, the shorter the electrical pulse, the less total energy is > available > (particularly in the audio frequency range), and no amount of "echoing > around" > (which is really just a form of filtering) can fix that. So there *are* > limits. > > Dana > > On Tue, Apr 21, 2020 at 7:49 PM Neville Michie <[email protected]> wrote: > >> 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. >> > _______________________________________________ > 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.
