Reply by David M. Palmer●November 10, 20072007-11-10
In article <5p43seFpef83U1@mid.individual.net>, Don Lancaster
<don@tinaja.com> wrote:
> John Larkin wrote:
> > On Fri, 2 Nov 2007 16:07:58 +0100, "BrunoG"
> > <noreply@micro-examples.com> wrote:
> >
> >
> >>Hi,
> >>
> >>Here is my suggestion to turn your oscilloscope into a clock with a PIC a 4
> >>resistors :
> >>http://www.micro-examples.com/public/microex-navig/doc/082-pic-oscillo-clock
> >>
> >>I'm opened to your destructive comments :)
> >>
> >>Bruno
> >>
> >
> >
> > Our expensive scopes already have time-of-day clocks.
> >
> > John
> >
> Can't you just tie a long rope on the oscilloscope and make a pendulum
> out of it?
Or knock on the door of the building supervisor and say "I will give
you this expensive oscilloscope if you tell me what time it is."
--
David M. Palmer dmpalmer@email.com (formerly @clark.net, @ematic.com)
Reply by Rene Tschaggelar●November 8, 20072007-11-08
Bruno,
this is cool. 5 bucks is a deal. If the freight
is not too expensive, I'm going to order one.
Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Reply by Mike●November 7, 20072007-11-07
Rocky wrote:
> On Nov 5, 7:54 pm, "Joel Koltner" <JKolstad71HatesS...@yahoo.com>
> wrote:
>> "HardySpicer" <gyansor...@gmail.com> wrote in message
>>
>> news:1194225262.821402.175060@z24g2000prh.googlegroups.com...
>>
>>> Can you go the other way and turn a $5 clock into a scope!
>> No, although we might be able to turn a $5 garage sale TV set into a scope :-)
>> (Not a very *good* scope, mind you...)
>
> Isn't that how they make multi-channel, multi-gigahertz digital
> sampling scopes? (More or less)
> Some high-speed ADCs, a bit of logic and a display.... :)
>
That�s exactly how they do it. Start with four DC to 20GHz preamps,
split the output of each preamp to four 12.5GS/s ADCs each with a phase
shifted clock and connect each ADC to a demultiplexer driving wide
slower memory. While you are at it, take a split off your preamps and
send it to your trigger comparator chip. (When you�re at Radio Shack, be
sure to ask for the premium trigger chip). Now you just have to read
back the acquisition memory, convert it to a raster image and send it to
your $5 garage sale TV. Voila, you have a 20GHz, 50GS/s digital scope.
Reply by Rocky●November 5, 20072007-11-05
On Nov 5, 7:54 pm, "Joel Koltner" <JKolstad71HatesS...@yahoo.com>
wrote:
> "HardySpicer" <gyansor...@gmail.com> wrote in message
>
> news:1194225262.821402.175060@z24g2000prh.googlegroups.com...
>
> > Can you go the other way and turn a $5 clock into a scope!
>
> No, although we might be able to turn a $5 garage sale TV set into a scope :-)
> (Not a very *good* scope, mind you...)
Isn't that how they make multi-channel, multi-gigahertz digital
sampling scopes? (More or less)
Some high-speed ADCs, a bit of logic and a display.... :)
Reply by Joel Koltner●November 5, 20072007-11-05
"HardySpicer" <gyansorova@gmail.com> wrote in message
news:1194225262.821402.175060@z24g2000prh.googlegroups.com...
> Can you go the other way and turn a $5 clock into a scope!
No, although we might be able to turn a $5 garage sale TV set into a scope :-)
(Not a very *good* scope, mind you...)
Reply by Joel Koltner●November 5, 20072007-11-05
"Vladimir Vassilevsky" <antispam_bogus@hotmail.com> wrote in message
news:B3pXi.41164$eY.1274@newssvr13.news.prodigy.net...
> There is one thing that I didn't understand: are you guys have terribly
> nothing to do?
Be kind, Vladimir. Someone who turns a 'scope into a clock (rather than just
a buch of 7-segment LEDs or an LCD or similar) definitely demonstrate a fair
amount of initiative and creativity; that's definitely worth something!
I took an AI class in college where we had a group assignment to
present/explain to the rest of the class some particular problem
solving/learning algorithm (I don't even remember what it was anymore...).
Besides presenting/explaining it, we'd taken a bit of extra time to go and
implement a Tic Tac Toe game using that algorithm -- got us a fair amount of
extra credit and kudos with the prof.
---Joel
Reply by Nobody●November 5, 20072007-11-05
On Sun, 04 Nov 2007 19:28:33 +0000, Vladimir Vassilevsky wrote:
> If you show a TV picture using an oscilloscope, could it be a way around
> the TV tax in some countries?
Nope; at least, not in the UK. If you receive a TV broadcast (whether by
radio, cable, internet[1], etc), you are required to pay the licence fee.
If you have a normal TV set, but only ever use it for watching DVDs (or as
a monitor for CCTV or an old home microcomputer), you don't need a
licence. OTOH, if you record broadcasts with a VCR, but don't actually
have a TV, you still need a licence.
[1] Internet downloads or video-on-demand streams don't require a licence,
only broadcasts. The distinction is whether the viewers all watch
concurrently, so a a streaming service where each viewer's stream starts
when that viewer connects isn't a broadcast.
Reply by HardySpicer●November 4, 20072007-11-04
On Nov 3, 4:07 am, "BrunoG" <nore...@micro-examples.com> wrote:
The entire image needs to move slowly around on the screen randomly to
prevent screen burn-in.
Dave.
Reply by Michael R. Kesti●November 4, 20072007-11-04
Vladimir Vassilevsky wrote:
>There is one thing that I didn't understand: are you guys have terribly
>nothing to do?
Have you never created designs just for the joy of doing so?
>If you show a TV picture using an oscilloscope, could it be a way around
>the TV tax in some countries?
I suspect it is the signal received that is taxed rather than the receiver.
--
========================================================================
Michael Kesti | "And like, one and one don't make
| two, one and one make one."
mrkesti at hotmail dot com | - The Who, Bargain