Hello David,
Humm, what time difference do we have? seems like they're up in Tucson
around the same time as here in NSW!
I did in fact take all of that into account, that's why I mentioned
I'd be happy to get 14dB dimming out of it (20 - 6)
The battery can be purchased through element14 or
would do _me_ a favour if you shut up until you have
something solid to report.
Frank
-Oorspronkelijk bericht-
From: Cobra007
Sent: Monday, January 30, 2012 9:04 AM
To: neonixie-l
Subject: [neonixie-l] Re: Hello from Sydney
I did in fact take all of that into account, that's why I
I think the chips should remain under the soldering iron
M
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On Jan 30, 4:49 am, David Forbes dfor...@dakotacom.net wrote:
On 1/30/12 12:06 AM, Cobra007 wrote:
snip
One thing about Nixie tubes that you may not be aware of is that they
need some time to start firing, because the plasma is triggered by an
external source of energy such as a photon from
_me_ a favour if you shut up until you have
something solid to report.
Frank
-Oorspronkelijk bericht-
From: Cobra007
Sent: Monday, January 30, 2012 9:04 AM
To: neonixie-l
Subject: [neonixie-l] Re: Hello from Sydney
I did in fact take all of that into account, that's why I
One thing about Nixie tubes that you may not be aware of is that they need
some time to start firing, because the plasma is triggered by an external
source of energy such as a photon from the room lighting or a stray cosmic
ray. The less ambient light there is, the more time they need to
Maybe dump the caps via an inductance [hopefully low R losses?].
Maybe monitor the current and switch it off as some of the H-bridge motor
drivers do? Except that uses some wasteful circuitry to achieve it.
John K.
- Original Message -
From: John Rehwinkel jreh...@mac.com
But this may not be the case for very short PWM pulses, as the oscilloscope
reveals a millisecond or two of variation in the voltage - ionization delay
in a multiplexed tube.
I'd be interested in seeing how much that variation varied with voltage. I'd
also be interested in seeing if
On 1/28/12 12:57 PM, kay486 wrote:
Id really like to see the finished watch! It would be really awesome
if somebody made new tubes using modern technology so they could have
much smaller digits, and being able to have them lit all the time,
just like normal digital watches.
Cant wait to see
:-) Well, Frank Bemelman from Lisse (which is about 5km from where I was
born).
Lot a cheese heads in this bunch (not the ones from Wisconsin). I
too, was born in the Netherlands. About 10mi (15Km) north of Eindhoven
(Phillips HQ). Though I've spent 50, of my 53 years, here in the Los
Angeles
On Jan 30, 11:21 am, John Rehwinkel jreh...@mac.com wrote:
snip
What I came up with is a little nuts, and probably would do horrible things
to tube life, but I haven't tried it yet. I was thinking of using a circuit
like the General Radio 1538 Strobotac, which has a cute way of building up
Thanks for all your comments.
I think that if the tubes wouldn't strike for whatever reason, those
problems can always be solved in the software. Another thing that
might help striking them quicker in darkness is the 3 backlight LEDs,
I can let a small current flow through them while the tubes
It is safe to say that anyone who has worked with vacuum tubes will tell
you, Don't do it!
Here are three reasons:
1. The tube leads are not consistently plated at the tube exit point, so
expect to not be able to use more than half of the tubes that you buy.
I've personally examined the
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron volts, and a blue LED
will only give you 3 eV.
Jens
Thanks for all your comments.
I
On Jan 31, 8:18 am, jb-electronics webmas...@jb-electronics.de
wrote:
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron volts, and a blue LED
Cosmic rays :-)
Jens
On Jan 31, 8:18 am, jb-electronicswebmas...@jb-electronics.de
wrote:
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron
I guess in a dark room you usually have some kind of matter between the
sky and your tube thus diminishing the rate of ionizing radiation.
But yes, some parts of this ionizing radiation are caused by protons and
alpha particles that arrive here from the sun at decently high energies.
They
Hey,
It could be that many 3eV particles will have a
similar result as a few 60eV particles, it's all in quantum mechanics
I suppose.
quantum physics tells you that it actually will not work, sadly. You
need to have just the right energy in one particle (photon, that is).
Jens
On Jan
I always wondered about using a bit of Uranium glass...
Nick
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On Jan 30, 6:35 pm, jb-electronics webmas...@jb-electronics.de
wrote:
Cosmic rays :-)
Actually, background radiation is enough, and that comes from a
variety of materials that surround us. But the usual source is just
light photons. Lots of it.
What happens is that it's all statistical... the
Gaston,
OTOH, cosmic rays are not bothered much for a couple flimsy concrete
blocks :)
you are right about that :-) But during night time the sun does not work
as a decent source anymore because 12000km of stone are a pretty good
shield, at least for solar particles. Then again, Nixie
On Jan 31, 5:57 am, Cobra007 mic...@xiac.com wrote:
You could convert a battery voltage to a nixie voltage relatively easy
with a MAX771 circuit. It will only not give you the maximum
efficiency. What I have done is basically design a circuit (using
multiple ICs) that together function in a
Michel,
Hi. I'd like to clear up a couple things that you don't seem to
understand about my Nixie watch design.
On 1/28/12 10:25 PM, Cobra007 wrote:
Hello David,
...
I have seen you used some open source software in your watch, that is
however not the most efficient way of software watch
Damn that looks really sweet, i could make the numbers look much
better if anybody could program it. Ive been playing with the idea of
making realistic CGI nixie for a while.
On Jan 29, 9:15 pm, Frank Bemelman bemel...@franktechniek.nl
wrote:
Hi David,
Well, I am not so amazed that we have not
Hello David,
Thanks for the explanation. I guess you made a typo somewhere because
I remember reading 200uA somewhere in your files rather than 13uA and
1 year rather than 7 years.
Your claim is then not correct, because at 50 readings per day and 2
seconds per viewing, the battery will only
Hi Frank, yes I saw that one, looks really cool. It's just that the
case doesn't match with the tubes. If you wear that one, nobody will
ever suspect that this might be a nixie watch :-)
On Jan 30, 8:15 am, Frank Bemelman bemel...@franktechniek.nl
wrote:
Hi David,
Well, I am not so amazed
a bit more research into the dynamics of this group :-)) ]
- Original Message -
From: Cobra007 mic...@xiac.com
To: neonixie-l neonixie-l@googlegroups.com
Sent: Monday, January 30, 2012 8:48 AM
Subject: [neonixie-l] Re: Hello from Sydney
Hello David,
Thanks for the explanation. I
On 1/29/12 9:35 PM, JohnK wrote:
Hmmm, I am in Australia too btw and have followed since your first post.
I wonder if you have picked up some of the local colloquialisms yet -
'having tickets on yourself' and 'having someone load the gun for you
but you pulling the trigger' come to mind.
John
into the dynamics of this group :-)) ]
- Original Message -
From: Cobra007 mic...@xiac.com
To: neonixie-l neonixie-l@googlegroups.com
Sent: Monday, January 30, 2012 8:48 AM
Subject: [neonixie-l] Re: Hello from Sydney
Hello David,
Thanks for the explanation. I guess you made a typo
Id really like to see the finished watch! It would be really awesome
if somebody made new tubes using modern technology so they could have
much smaller digits, and being able to have them lit all the time,
just like normal digital watches.
Cant wait to see your design.
--
You received this
Let's see if this works, picture should be here:
http://xiac.com/Images/NixieComp3.jpg
I am still in doubt about the watch band size, I think 26mm is too
big, so I am thinking of 22 or 24mm.
Best regards,
Michel
On Jan 29, 12:01 am, jb-electronics webmas...@jb-electronics.de
wrote:
Hello
I totally agree with that but I guess the old machinery no longer
exists so it's going to cost quite a bit to setup a new production
line for micro sized nixie tubes. I can't really see the micro nixie
tubes being used in anything else but a retro style application, so
the market for a tube like
I do not think that it is possible to make much smaller Nixie tubes than
the NL-4998 which is basically the tiniest Nixie tube ever made. The
problem is the glow discharge, it is always larger than the cathode, and
you cannot make the cathodes too small because otherwise you wouldn't be
able
Yes, if you could manufacture new NL-4998 tubes that were only half
the height of the original ones (12.5mm versus 25mm), you would end up
with a tube that had great potential for wristwatch applications!
On Jan 29, 8:51 am, jb-electronics webmas...@jb-electronics.de
wrote:
I do not think that
It is not that easy:
The product of pressure and electrode distance determines the striking
voltage (Paschen's curves). It is roughly U_strike ~ [p*d]^2 where p is
pressure and d is distance. If you decrease the distance, then you have
to use a higher pressure to obtain the same striking
@googlegroups.com] On
Behalf Of jb-electronics
Sent: zaterdag 28 januari 2012 23:26
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Re: Hello from Sydney
It is not that easy:
The product of pressure and electrode distance determines the striking
voltage (Paschen's curves). It is roughly U_strike ~ [p*d
Maybe it would be possible to reduce the size without changing too
much to these distances and pressures. For example, if you would let
the cathode pins come out of the side of the tube rather than the
bottom, you'd probably save about 7-8mm already. So you don't need to
modify the current grid
On 12-01-28 05:40 PM, Tidak Ada wrote:
May be, besides PanaplexR, VFD with an orange phosphor is an alternative (if
such a phosphor exists for that purpose). But I am afraid the construction
of an VFD display is way more complicated...
Back in the 1970's I worked in a shop that sold
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