Tobias
>
> On Jun 6, 1:53 am, Dekatron42 wrote:
>
>
>
>
>
>
>
> > Don't forget to measure half-wave rectified signals to see what
> > results you get (square, sine and triangular) as that is something
> > that many RMS meters fail on.
>
> >
and try to take some measurements.
>
> You say doing time interrupt is going to slow this down. What about
> counting all the 1000 readings and dividing by the time it took to
> make them? Not a good idea?
>
> Tobias
>
> On 5 jun, 04:14, Cobra007 wrote:
>
>
>
>
>
> The way to do this properly, as in how a real DMM does it, is to use a
> dual-slope converter that will produce a useful number with every sample.
>
> These successive approximation converters that are common as dirt these
> days are just not very good at the job of converting a signal and
> pr
You should also try to avoid doing anything else but the absolute
necessity in your loop.
I think you can write a second routing dmm.getBusVoltageFast(), that
does nothing more than the absolute necessity, which is reading the 2
bytes from the INA219. No conversion or anything else needs to be don
= DIR_CW ? ++state : --state) > 3)
> state = 0; //switches between the cases
> //sum += sq(dmm.getBusVoltage());
> result = dmm.getBusVoltage(); //reads the two bytes from the
> INA219 and performs basic conversion to get value in mV.
> }
> reading = millis(
> Not to worry! The INA219 has a built-in sample averaging mechanism.
>
> You can ask it to take up to 128 samples and average them to produce one
> number to receive over the I2C bus.
>
> --
> David Forbes, Tucson AZ
That won't be of much help as you need the average over the squared
samples, not
.wordpress.com/2012/06/dscn4054.jpghttp://tobiasmugge.files.wordpress.com/2012/06/dscn4053.jpg
>
> Cobra007: I can definitely try that out! I know how the math should
> look like on the paper, but I have no idea how to implement this on
> the controller. I would think it uses a time interrupt to capture the
>
Nice project!
You could make a real true RMS meter with this by implementing the RMS
integral in your uC if it is fast enough. I would like that better
than other methods some "true RMS" DMMs use.
Michel
On Jun 4, 6:39 pm, jb-electronics wrote:
> Tobias,
>
> the INA219 is amazing! Do you kn
That is impressive! Got a finished one already?
Michel
On Jun 2, 8:29 pm, kay486 wrote:
> Now thats some high tech nixie clock! Love it! Are you planing on making a
> new board for Z566M and similar tubes?
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"neonixie
I also sent out a parcel to Germany last year, took ages to arrive (at
least 8 weeks). No troubles when using Fedex or TNT though.
Has anyone ever shipped something to Egypt lately? Does that give any
troubles?
Michel
On May 29, 5:41 am, threeneurons wrote:
> Another German customer sent me a
That is cool, looks a bit creepy though. Reminds me of things happened
about 70 odd years ago.
I assume that those "glitches" are in fact programmed features, it
suits the clock really well, makes it a bit more spooky.
Nice work, for sure! Thanks for posting.
Michel
On May 28, 10:08 pm,
Wow, does he deserve a free Nixie Clock or other (smaller) gift?
Welcome to the group heavyleaded!
Michel
On May 21, 11:07 pm, Nick wrote:
> Today (21st May 2012) we welcome our 500th member, heavyleaded, to the new
> group!
>
> Nick
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Too large?? I think it is too small :-). I tried to make it as small
as possible and in my opinion it ended up to be too small :-).
I want to make a new design in the future (you know, "one day") but
then a normal size domino tile (2" x 1")
No, I have no website with projects, I am more or less sn
Thanks Dieter & Jens,
LED watches have indeed the same problem. I made a domino watch some
time ago:
http://www.facebook.com/pages/Domino-Watch/290040851018314
Not as stunning as the Nixie Watch but I incorporated the same trick
with an ambient light sensor otherwise it really is a shock when you
think of
> something else which would be easier to photograph that would work as a
> point of reference.
>
> -Adam
>
>
>
>
>
>
>
> On Fri, May 18, 2012 at 10:59 PM, Cobra007 wrote:
> > That is an option or else I was thinking of making 2 separate
> > pictur
needed for the moon.. and then, of course,
> there is the issue of exposure, but that one is easily solved with HDR.
>
> -Adam
>
>
>
>
>
>
>
> On Fri, May 18, 2012 at 10:11 PM, Cobra007 wrote:
> > time. Just what I had in mind during my eureka moment! I also wa
same
time. Just what I had in mind during my eureka moment! I also want to
take a picture with full moon and the nixie watch beside it, that's
going to be a bit tricky so I am still thinking about how to get that
done.
Michel
On May 19, 2:50 pm, David Forbes wrote:
> On 5/17/12 6:15
> Regards, Jeff
>
>
>
>
>
>
>
> On Friday, May 18, 2012 4:55:50 AM UTC-7, Cobra007 wrote:
>
> > Thanks Guys!
>
> > Sure there is also a video coming one of these days but I first need
> > to finish off a bit of work here that I had put aside.
>
&g
Thanks Guys!
Sure there is also a video coming one of these days but I first need
to finish off a bit of work here that I had put aside.
@Lucky, yes it totally meets my expectations and in some areas even
exceeds them. Would I have done anything different? Well, not about
the watch but for su
G'day Folks!
It's been about 4 1/2 months since I had a eureka moment of how to
design and make my Nixie Watch. It is finally there and guess what, I
am wearing it :-).
I know some people on this forum showed some initial doubts, which I
can totally understand, but I finally have something to sho
I am missing the "I like this" button on Google groups :-)
Michel
On May 12, 1:18 pm, AnubisTTP wrote:
> The obvious solution is to geek out completely and make a dekatron
> watch that tells time in metric! Use two A108s and divide the day into
> 10 hours of 100 minutes, then have the first tu
wrote:
> On Friday, May 11, 2012 3:50:20 PM UTC-7, Cobra007 wrote:
>
> > Nice tubes, had a look at some on youtube. They still seem relatively
> > large. If there was a dekatron that would fit inside a B4998 envelope
> > it would more appealing. ...
>
> > Michel
ow progress as my family and work takes most of my time.
>
> /Martin
>
> On 12 Maj, 00:18, Cobra007 wrote:
>
>
>
>
>
>
>
> > Thanks Martin,
>
> > It is of course technically possible to use dekatrons, but are there
> > any that are small enough for
e small enough Nixies to make a four digit watch the
> same (or smaller) size! If it would have been possible to make the
> counting logic with small dekatrons I would have paid anything to get
> one!
>
> /Martin
>
> On 11 Maj, 13:38, Cobra007 wrote:
>
>
>
>
>
&
at Michel, looking fine I must say congrats on your hard work. Will be
> interesting to see the case/strap you design for it.
>
>
>
>
>
>
>
> On Thursday, 10 May 2012 08:27:58 UTC+1, Cobra007 wrote:
>
> > Programming is almost done!
> > There are 9 settings t
All done!
I probably need to polish the software here and there to remove traces
of debugging and add a bit more comment so that I can still find out
what I was thinking in about 10 years from now. But overall,
everything works.
I added the following parameters that the user can change to their o
Hi Jens,
They do have them for higher voltages as well.
See here a 650V model:
http://au.element14.com/bourns/cmf-rl50a-0/cptc-radial-telecom-50-ohm/dp/1652209
I would put it on the on the 230V side of the transformer. You can
also do it in the 15V line but my experience is that you loose quite a
I think the I_max that you specify is not really correct. I_max could
be much higher because you're charging a capacitor, it's not a
resistor. It looks like you are after a 542V power supply that can
supply 30mA (16VA/542V). I_max is not really relevant I think. What
you could do is add a PTC reset
Programming is almost done!
There are 9 settings that the user can change according to his/her
preference. This is related to tube brightness, time format, rotation
speed, power saving modes and sensor sensitivity. Additionally, there
are 2 settings for calibration of the RTCC to fine tune it down
If you want to remove 0 - 255 pulses per hour, I would use a second
controller in an 8 pin DIL package. They are dirt cheap. You could
convert the 2 binary switches (0-F) to an analog signal through two 4
bit R-2R networks, or just use a couple of weighted resistors for each
bit. The controller rea
Yes, I agree! It gives a bit of insight to what "Cathode poisoning"
actually refers to.
Thanks for typing this up!
Michel
On Apr 25, 10:24 pm, Imbanon wrote:
> Finally a good answer to this question. That was very informing.
> Thanks!
>
> On Apr 25, 10:26 am, "JohnK" wrote:
>
>
>
>
>
>
>
> > I
It sounds a bit funny to me. If you use the russian drivers, they have
100V outputs so that shouldn't be a problem at all assuming you use
something around a 180V-200V power supply.
There is however a difference in russian drivers, some are 74141
equivalent and some are 7441 equivalent (while they
Hi Jens,
I know you can make things in 1,000 different ways but in the end, it
is powered by a battery which basically means your solution cannot use
more than say 5uA average current. There is not a lot you can do with
that :-) And secondly, the ideal solution would preferably fit within
1 cubic
It really is a bit more complicated than that Jens. I generate a very
short but very strong IR pulse, I'd have to check the exact numbers
but it is somewhere around 250mA for 2 or 3 usec. The IR light
reflects from an object above the watch (a hand for example) onto an
IR photodiode. To make this w
Hi Jens,
That's how I did it on my concept board, with an external interrupt.
Problem is that I need more components to be able to generate the
interrupt and believe it or not, it actually used more current.
Standby mode means the processor is in sleep mode but wakes up about 8
times per second to
Thanks Dieter, do the tubes look almost as nice as your blue dream
clocks? ;-)
On Apr 20, 5:27 pm, Dieter Waechter wrote:
> Very well done Michel!!!
>
> Am 20.04.2012 08:26, schrieb Cobra007:
>
> > Second glimpse of the Nixie Watch.
>
> >cut<
--
You receive
Second glimpse of the Nixie Watch.
The software is taking shape, it can display the time by motion
detection and return back to sleep.
The basis for the complete menu structure for all settings has also
been programmed.
At the moment it displays the time registers, but the registers
themselves are
That is a great review (and a great clock).
Thanks to Brain, or thanks to Brian ? :-)
Michel
On Apr 17, 6:13 am, "Dieter Waechter" wrote:
> Hi!
> The IN-18 Blue Dream Nixie Clock Review is out!
> Watch it!http://vimeo.com/40193867
>
> Thanks to Brain! ;-)
> Dieter
--
You received this messa
Just an idea, if you really don't have space for an extra resistor,
the port B has internal pull-ups that can be enabled and might do the
trick for you. You won't be able to use the I2C peripheral of the PIC
in that situation as it is on port C and cannot be re-located on the
18F2520, but with a bi
torage, I have
> not seen any comments on that.
>
> /Martin
>
> On 14 Apr, 04:23, Cobra007 wrote:
>
>
>
>
>
>
>
> > On Apr 14, 5:14 am, J Forbes wrote:
>
> > > What battery are you using in the prototype? is it the same one you're
>
On Apr 14, 5:14 am, J Forbes wrote:
> What battery are you using in the prototype? is it the same one you're
> planning to use in the watch?
>
Yes, same battery 1/2AA size.
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To post to this group,
they appear just bright enough.
>
> > Michel
>
> > On Apr 12, 11:16 pm, Lucky wrote:
> >> Great little taster (or should that be 'teaser') Michel, look forward to
> >> seeing you develop it further, must be great seeing it finally take shape.
>
>
night they appear just bright enough.
Michel
On Apr 12, 11:16 pm, Lucky wrote:
> Great little taster (or should that be 'teaser') Michel, look forward to
> seeing you develop it further, must be great seeing it finally take shape.
>
>
>
>
>
>
>
> On Thur
Thanks Jim, really appreciate that! The module fits nicely in my 50mm
diameter & 16.5mm thick enslosure.
Michel
On Apr 12, 12:02 pm, J Forbes wrote:
> Looks good! How is it doing for size?
>
>
>
>
>
>
>
> Cobra007 wrote:
>
> >http://www.youtube.com/w
Thanks Jim, really appreciate that! The module is 46mm in diameter and
about 13.5mm high. It fits nicely in the 16.5mm high, 50mm diameter
enclosure.
Michel
On Apr 12, 12:02 pm, J Forbes wrote:
> Looks good! How is it doing for size?
>
>
>
>
>
>
>
> Cobra007 wrote:
I had a bit of time this week to get the first module working. It's
not finished yet, at the moment it only counts from 00 to 59, but for
as long as that works, the rest is just a bit of coding.
This video shows the tubes at maximum brightness (which is about 2mA
DC average per tube @ 200mA batter
Happy Easter from Sydney too!
Hope I don't mix up the nixie tubes and sausages before throwing them
on the barbie!
Michel
On Apr 8, 9:54 am, Imbanon wrote:
> Happy Easter to all the nixie tube lovers! Go have some nice Easter
> breakfast with your families :)
--
You received this message be
>
> Opinions for and against I don't mind, but I would like to see the tone of
> the discussions lifted; please?
>
> regards,
> John Kaesehagen
> Australia
>
No worries John, I know what you're saying.
Michel
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"neonixi
>
> I plan to make more prototypes myself in a while. I have an Ultimaker 3D
> printer kit in a box waiting for me to assemble it, after I get caught
> up on shipping product to waiting customers.
>
> --
> David Forbes, Tucson AZ
If you're planning to make prototypes soon, then why the rush to hav
t the outer contour so it really seemed
like this was done on purpose.
Michel
On Apr 7, 4:44 pm, David Forbes wrote:
> On 4/6/12 8:54 PM, Cobra007 wrote:
>
> > I am thinking maybe the 3D printed end result was just different from
> > your design, what are those "smears&
d see how the parts fit, etc. Is there anything else about
> the design you don't like besides the quickie 3d printing issues?
>
>
>
>
>
>
>
> Cobra007 wrote:
> > I am thinking maybe the 3D printed end result was just different from
> > your design,
//xiac.com/Images/nwl_proto1_fronta.jpg
How long would it take to print this in high resolution?
Michel
On Apr 7, 1:35 pm, David Forbes wrote:
> On 4/6/12 5:03 PM, Cobra007 wrote:
>
> > Just a question, is this one of those entry level 3D printers that
> > retail for around
r everybody!
Michel
On Apr 7, 1:09 pm, Terry S wrote:
> Maybe you should keep those kind of opinions to yourself. All we've
> seen from you is vaporware.
>
> On Apr 6, 7:00 pm, Cobra007 wrote:
>
>
>
>
>
>
>
> > I respect what you're trying to
Just a question, is this one of those entry level 3D printers that
retail for around $1000 or so? I was actually thinking of buying one,
but if this comes out of that printer, I am not really that
enthusiastic about it.
Michel
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You received this message because you are subscribed to the Google
I respect what you're trying to do here (create something that looks
old), but IMHO I say with a soft voice that it doesn't look very
attractive. But maybe that was just what you intended to create, so in
that case you definitely put onto the table what you had in your mind.
Michel
On Apr 6, 3
Yes, I definitely agree with you, a real work of art. I like the
steampunk look of this clock. It was inspired by the lantern clock, as
he also mentioned in the video, but he definitely gave it an extra
dimension. The only thing I don't really like is the up-side-down 2
rather than a real 5, but he
I never used an Arduino before but this seems like all you need to
know about the SPI:
http://arduino.cc/en/Reference/SPI
The bit-bang method is still interesting to try things out as you get
to fully understand what will happen once you start using the SPI.
Michel
On Apr 1, 11:10 am, Dylan D
What kind of protective coating did you use to prevent the elements
from corroding your copper parts?
Michel
On Mar 8, 4:20 am, Grahame Marsh wrote:
> http://www.sgitheach.org.uk/scope1.html
>
> Enjoy
>
> Grahame
--
You received this message because you are subscribed to the Google Groups
"
Let's see who will win the race to make the first clock with these
tubes :-).
I still wonder how it will scan a character, do you set the "X-Y"
voltages for the character and then perform a scan of the character,
or do you scan a series of characters slice by slice? If you want your
signal to be c
I would like to see that too, with all analogue technology to drive
the monoscope and CRT. Not so easy to replicate I think. From Nick's
datasheets it seems like they used this type of tube for flight
information screens in airports. So I may well have seen this in the
early 1970's, but never reali
Interesting, it sounds like a very complicated way to display
characters. Your datasheet is dated 1966, I thought they would have
had some more modern technology by that time?
Michel
On Mar 24, 7:24 pm, Nick wrote:
> On Mar 24, 8:12 am, Cobra007 wrote:
>
> > What does that ex
What does that exactly do? It looks like it is something similar to a
more modern character generator ROM. Is that right?
Michel
On Mar 24, 4:12 pm, lai...@wcoil.com wrote:
> Standard disclaimer not my auction not affiliated with the seller.
> Somebody has Raytheon CK1414F10C monoscopes buy it
longer tube life, I will make
> > > changes to the schematic immediately.
>
> > > Thanks!
>
> > > On Mar 19, 12:04 am, Dylan Distasio wrote:
> > >> I'm very interested in hearing more about this module...Are you saying
> > >> you
>
I would choose for number 2, used that method before and worked out
really well. I think it'a also the quickest way and perfect if you
want to make multiple boards.
Michel
On Mar 22, 7:55 pm, Quixotic Nixotic wrote:
> On 21 Mar 2012, at 01:19, P.Berk wrote:
>
> > Can anyone point me to how to
Seems quite advanced for something that is completely free. Does
anyone know how this compares to Multisim / Ultiboard? What I
specifically like about Multisim / Ultiboard is that it stores the
information of the parts in the design files. So even if you open the
files on another computer that
It can be done, but it could be quite a lot of work. Can you post a
scan from the magazine and a scan from the circuit itself as well?
Michel
On Mar 21, 12:19 pm, P.Berk wrote:
> Can anyone point me to how to convert a full-size pc board diagram from an
> old magazine to a form that a pc boar
Should have pushed the "buy it now" button as soon as they came up on
ebay Only 10 pieces left not really worth the effort to design
another watch.
Michel
On Mar 20, 11:19 am, Jeff Thomas wrote:
> Nice to see some of these little nixies surface.
> Perfect if you want to build a tiny ni
That should be fine Adam, I should have 50 modules in a couple of
weeks so I do have a few spares :-).
Michel
On Mar 19, 11:31 am, Adam Jacobs wrote:
> I would be interested in this as well. Are you planning to market and
> sell these modules?
>
> On 3/18/2012 4:19 PM, Co
hearing more about this module...Are you saying you
> are having this custom manufactured? If so, how have you found a way to do
> this economically?
>
>
>
>
>
>
>
> On Sun, Mar 18, 2012 at 6:31 PM, Cobra007 wrote:
>
> > For my clock I am designing a module as
> do you mean by setting the input to A? Setting a logic 1 to the A
> input pin by the datasheet? That only sets the output to "1". My
> design so far didn't use blanking with the 74141's. I just turned all
> anodes off for 200us, and I never had
special curves have
> > a voltage span of approximately 10-30V for a certain current through
> > the Nixie, so there is an upper and a lower limit for the turn-on
> > voltage corresponding to the current used.
>
> > This book:http://www.oldtimeradio.de/BU7908.php"Electro
I don't use anode resistors either for the obvious reason that they
consume power and therefore reduce the overall efficiency of the
circuit. If the circuit is not powered by batteries, this is not
really a problem, it will only increase the electricity bill :-).
Michel
On Mar 17, 7:39 am, Davi
:http://www.oldtimeradio.de/BU7908.php"Electronica 171 -
> Elektronische Anzeigebauelemente" by Winfired Müller contains a few of
> these curves for the ZM-series of Nixies.
>
> /Martin
>
> On 16 mar, 00:55, Cobra007 wrote:
>
>
>
>
>
>
>
> > Yes, I thin
according
to the above measurements, the increase in tube voltage will be
playing a role.
Michel
On Mar 16, 10:06 am, Charles MacDonald wrote:
> On 12-03-15 05:46 AM, Cobra007 wrote:
>
> > So it looks like your resistor is correct. The only thing is that the
> > voltage a
Interestingly, I just realize, if you work this further out you come
to the following formula:
Rmux = Rdc * (T1/T)
Rdc is the anode resistor in direct drive (55V / 2mA = 27.5k)
Rmux is the anode resistor in a multiplexed system = 27.5k * 0.267 =
7.3k :-)
Michel
--
You received this message bec
is out to me?
>
> And about that spider web.. it isn't really as messy as it looks in
> the video. It's just a matter of viewing angle. And everything is
> organised by cable color.
>
> Thanks
>
> On Mar 14, 1:24 am, Cobra007 wrote:
>
>
>
>
>
>
&
o tubes at a time? By the way, I am using blanking period
> > of 200us, so maybe the current really settles by this time, so the
> > supply needs to give enough current for only 2 tubes.
> > Can someone clear this out to me?
>
> > And about that spider web.. it isn'
r and then you can measure the
voltage over the series resistor with a normal DMM, which should be
1.2V for 12mA.
You probably need a resistor between 3k3 and 4k.
Now it should be OK :-)
Michel
On Mar 14, 11:05 pm, Cobra007 wrote:
> I can smell a misunderstanding here (from my side, that
I can smell a misunderstanding here (from my side, that is).
What are you trying to achieve? I just read your previous posts, it
seems like you're after 2mA average current per tube, so your power
supply should be able to deliver 12mA in total.
I assume the anodes from the 2 tubes go through 1 re
gt; AFAIK, the old instruments that gave a true-"true RMS" output measured
> > the heat generated by the signal when applied to a resistor. That way
> > the waveform shape did not affect the measurement, and they were able
> > to measure with the DC component included, s
ok, I forgot to insert the link
http://youtu.be/2jsZ6eMOxjc
On Mar 12, 4:16 pm, Cobra007 wrote:
> Uploaded for David but didn't want to post in a non related thread.
>
> This is 1024 steps brightness control of a nixie tube through 2
> individual PWM channels. At low br
Uploaded for David but didn't want to post in a non related thread.
This is 1024 steps brightness control of a nixie tube through 2
individual PWM channels. At low brightness it looks like it's missing
something from the top of the zero but in reality it appears just
fine.
Michel
--
You receive
>
> I don't think that's a good idea. Nixie tubes look much better when
> driven by a low duty cycle with full current, rather than a high duty
> cycle with very low current. The cathode won't light fully at lower
> current, and the glow is more "fuzzy" and indistinct.
>
> Try it and see.
>
That i
on, and I also appreciate the bases being on one side, thanks
> for helping me discover this component!
> -Paul
>
> On Mar 11, 11:06 pm, David Forbes wrote:
>
>
>
>
>
>
>
> > On 3/11/12 4:44 PM, Cobra007 wrote:
>
> > >> Then don't turn on the
or multiplexing only varies between 40 and 50% I think.
Michel
On Mar 12, 2:06 pm, David Forbes wrote:
> On 3/11/12 4:44 PM, Cobra007 wrote:
>
>
>
>
>
>
>
>
>
>
>
> >> Then don't turn on the other tube at that time! I turn on only one t
>
> Then don't turn on the other tube at that time! I turn on only one tube
> at a time, which removes that problem.
>
That is not completely true, it's not that I turn on both tubes at the
same time, it is because the current starts to flow through the wrong
tube because IT CAN. With a 170V anod
>
> A fine way to achieve the PWM dimming you want with a low-voltage Nixie
> driver is to have a current measurement device in the power supply's
> feedback path, which is conveniently provided from the common emitter
> terminal of the TD62083 (ULN2083).
I think this is what you have done in your
s first. Then only use the circuit that suits your needs
> the best.
>
>
>
>
>
>
>
> On Sunday, March 11, 2012 1:07:24 AM UTC-8, Cobra007 wrote:
>
> > Yes, of course 180V would have been enough for my circuit, but Paul
> > was after high voltage drivers (he mention
Yes, of course 180V would have been enough for my circuit, but Paul
was after high voltage drivers (he mentioned 300V) and I wasn't sure
if 180V would be enough in his situation.
>
> We can discuss this all day long, but it seems to be "trying to teach a pig
> to sing".
>
I don't really see the n
>
> On the production Nixie Ramos clocks I intend to use
> these:http://www.nxp.com/documents/data_sheet/PMBTA42DS.pdfThey are dual
> NPN 300v transistors that are really cheap. The downside is that there
> are only 2 transistors per chip, so that's 5 per digit, so they are
> going to significantl
Nice clock Grahame! I like the barcode time as well, did you actually
check if a CCD barcode reader can decode it?
At first I was wondering why you use such large capacitors (100uF/
100V) for the voltage multipliers but then I saw you use the mains
frequency as input source, so that makes sense.
That is indeed a great clock Jeff! Looks like you're selling them way
below market price!
Michel
> Yeah! I'd let you call me anything you want if you paid me that much for a
> pair of B7971's :)))
>
> And I'm selling the GPS FLW's complete with enclosure, four tested and
> guaranteed B7971 tube
Yes, you're right Nick, the Fluke is indeed AC coupled. I didn't
expect that to be honest as it undermines the definition of "true RMS"
but a simple battery test shows 0V RMS :-).
Michel
On Mar 5, 6:08 pm, Nick wrote:
> Digital MMs sample and require a periodic waveform to give accurate resu
If you direct drive them @ 12mA and you want to have them the same
brightness when multiplexed, you will need to increase the current to
36mA (as they are only on for 1/3 of the time). Which means 12mA for 2
tubes at all times, 6mA per tube @ 33% duty = 2mA average current per
tube.
Adam is right,
That is a cool clock, the display looks so bright! I was wondering, as
you have 7 digits, if you can set the clock to display the tenths of
seconds as well (like the Heathkit GC-1000)?
Michel
On Mar 4, 6:47 am, "kosbo.com" wrote:
> Hi All,
> As you might remember, I was looking for anode dri
Wow, yes that will hurt a bit
The other ones were NOS if I am not mistaken, but I think these ones
are used. He said they are not soldered but that is probably because
they sit in a socket :-).
Michel
On Mar 2, 11:48 am, Nicholas Stock wrote:
> http://www.ebay.com/itm/260964813563?ssPageNa
Bob,
Thanks for the details.
>
> Someone asked can Linux reliably capture 1ms events ? Answer: Yes,
> but; You would have to write a kernel module to reliably collect the
> data at that rate. You could get finer granularity, but you'd need to
> muck with the scheduler. Not bunny hill stuff.
>
Do
And a second question, does anyone know if this board can be used for
real-time applications? Say something like capturing a 1ms timer
interrupt that is guaranteed never to skip one int call?
Michel
On Mar 1, 8:51 am, Cobra007 wrote:
> My question for something that has just been relea
My question for something that has just been released would be what
language is the main stream programmers going to use to program these
computers? Is it indeed Python, or will it be a C based language. It
is aimed for teenagers, but that's not where it will end.
Michel
On Mar 1, 5:25 am, Gra
I suppose everyone has seen this website already, but I post it here
just in case you haven't.
http://eeberfest.net/tubetoys.php
Apparently not a very cheap project to start these days :-)
Michel
On Feb 17, 6:37 am, marcin wrote:
> http://www.ebay.com/itm/290668961727$137.5 a piece for two unt
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