Nixie thermometer in Elektor journal

[Huggermugger]

Looking for the latest pre-amp project I saw this little project involving IN-14 and IN-19A nixies.

http://www.elektor.com/magazines/2012/june/nixie-thermometer-hygrometer.2159318.lynkx

 

/Magnus

[Mich...@aol.com]

I couldn't find (although didn't search long), if it will output F as well as C?

 

Michail

[Huggermugger]

Guess temperatures in Centigrades as the designer propably is from Dutchland (Netherlands that is). But I'm not sure. Haven't yet seen the mag in our local library.

Will keep my eyes open though.

Magnus

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[Dave]

Has anyone downloaded and read the .pdf?
Is there anything of special note in it that can't be gleaned from the PCB silkscreen and BOM?

The pic hex file seems to be in the source zip file.  This should allow for a direct creation of the needed pic and for those with the correct compilier setup the ability to change the code to display F instead of C.

[Huggermugger]

If you join the Elektor Club (no costs) you get 10 Elector pesetas and can buy the article for that amount.

 

Magnus

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[Charles MacDonald]

On 12-07-03 06:46 AM, Huggermugger wrote:
> Guess temperatures in Centigrades as the designer propably is from

> Dutchland (Holland) (Netherlands that is).

> I couldn't find (although didn't search long), if it will output F

> as well as C?oogle.com/group/neonixie-l?hl=en-GB.

there are only a few locations worldwide that still use Fahrenheit. if
the ability is not mentioned, I would not exapet it to be available.
--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
http://users.trytel.com/~cmacd/tubes.html
No Microsoft Products were used in sending this e-mail.

[Mich...@aol.com]

I would think that USA is big/well known enough and probably the largest user of Nixie for fun devices that a programmer would have implemented (easily) a Fahrenheit feature.

 

A feature which would take maybe a couple hours (at most) to add, would be smart to open your product open for a wanted item for an entire country.

 

It was just a thought.

 

Michail

[Dave]

In the article, the author states that F is not on the IN-19 tube he used and that is why there is no Fahrenheit feature.
Personally, I would displayed Fahrenheit after the C reading and simply blanked the IN-19.

[Dave]

Done, article retrieved if anyone has questions, just post and I'll answer.

[Lucky]

Still makes me laugh, here in the UK people use Fahrenheit when describing 'hot' days but Centigrade when 'cold'!
Anyway I think it should be measured in 'Kelvins' ;) 

[Frank Bemelman]

If we keep supporting Fahrenheit you poor guys never
get rid of it ;-) Next items on the agenda is 60Hz for Europe
and driving on the right for the English. Let's do it.
Good for the economy as well...

Frank

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[Nick]

On Wednesday, 4 July 2012 05:28:41 UTC+1, Lucky wrote:

Still makes me laugh, here in the UK people use Fahrenheit when describing 'hot' days but Centigrade when 'cold'!
Anyway I think it should be measured in 'Kelvins' ;) 

No-one that I know of in the UK still uses degrees F, except superannuated old fogies who still believe we have an empire...

The only thing you need to know is that the BBC and the Queen use degrees C... I rest my case... 

...though we use imperial measures for length (but often also metric) and distance, speed & area, volume of draught beer and milk (but not petrol) etc. simple really.

[Huggermugger]

Having made 4 major tours in the States, I am rather used to Fahrenheights
(but not Rocky Mountain), inches, gallons and miles, so IF Elektor could
offer both F and C, that would be nice. On the other hand, my more
physicistisch ego would like to see some Kelvins here.

Magnus

----- Original Message -----

[John Rehwinkel]

> Having made 4 major tours in the States, I am rather used to Fahrenheights (but not Rocky Mountain), inches, gallons and miles, so IF Elektor could offer both F and C, that would be nice. On the other hand, my more physicistisch ego would like to see some Kelvins here.

Doesn't anybody want Rankine?

- John

[Nick]

On Wednesday, 4 July 2012 11:50:51 UTC+1, Soundbrigade wrote:

Having made 4 major tours in the States, I am rather used to Fahrenheights
(but not Rocky Mountain), inches, gallons and miles, so IF Elektor could
offer both F and C, that would be nice. On the other hand, my more
physicistisch ego would like to see some Kelvins here.

This is the joy of DIY - use the Elektor project as your inspiration and do your own thing based on it.

Far easier - the reason most of us design/build own own stuff is that everything else is a compromise - someone else's view of what we want.

30 years ago I used to build my own speakers - now I'm just getting back into that as I'm unhappy with paying someone else a lot of money to give me not quite what I asked for! 

[Tidak Ada]

Kelvin is possible with the IN-19A It has a 'K' ;)

[jb-electronics]

Yeah, but it is a small prefix k, I think it is easy to see when used
with numerals.

Jens

[Lucky]

UK
Liquid volume: pints for fresh milk but litres for evaporated-pints for beer but millilitres/mills for spirits

Distance/length: miles/yards/feet for distance but metres/centimetres for building materials (and drawings)

Weight: Lbs/ounces for produce (and sometimes grammes but we wont go into that) but kilos for body weight ('cept for 'old fogies' who still use stones)

Ask someone how long a cable you need they will answer in feet but we buy it per metre

We say a car is 10ft long but measure its boot capacity in litres, engine capacity in litres but still talk of horsepower

People talk of 1/4 of a %! (That to me is the 'best' one, combining fractions with metrics)
No wonder we can be a mixed up lot, we will drag ourselves into the 20th century kicking and screaming (Might get to the 21st someday too)

Nick you know what the queen uses?!
Anyway if you want Fahrenheit just remember Tf = (9/5)*Tc+32, simples ;)

[Tidak Ada]

[Tidak Ada]

As far as I remember, it is a small capital K, not a lower case...

eric

[John Rehwinkel]

> Liquid volume: pints for fresh milk but litres for evaporated-pints for beer but millilitres/mills for spirits

No more nipperkins or brown bulls? Alas.

> Distance/length: miles/yards/feet for distance but metres/centimetres for building materials (and drawings)

Back when I took drafting courses, everything was in millimeters. Or millimetres.

> Ask someone how long a cable you need they will answer in feet but we buy it per metre

Apparently jute cord is still sold by weight here. Which rather boggles me.

> We say a car is 10ft long but measure its boot capacity in litres, engine capacity in litres but still talk of horsepower

I see engine capacity measured in kilowatts, but torque in pound-feet.

> People talk of 1/4 of a %! (That to me is the 'best' one, combining fractions with metrics)

My favourite mixed one is tyres - for example, P225/60R17. That's a 225 millimeter wide tyre for a 17 inch wheel,
with a 60% aspect ratio. That's just nuts.

> No wonder we can be a mixed up lot, we will drag ourselves into the 20th century kicking and screaming (Might get to the 21st someday too)

Agreed! As I got into electronics at an early age, I was already familiar with the prefixes (pico, micro, milli, kilo, mega, and so forth). For some
reason, "nano" seemed to get left out for a while (as "pico" did, back in the days when a 200pf capacitor would be referred to as a "200mmf condenser").

> Anyway if you want Fahrenheit just remember Tf = (9/5)*Tc+32, simples ;)

I figure people who prefer Fahrenheit probably aren't terribly particular about accuracy, so I approximate Tf = 2⋅Tc.

Then again, I like to give my age in hexadecimal.

- John

[jb-electronics]

It was used for prefixes, like kOhm or something like that, so that is
why I think of it as a lower case. But it is not so clear to me anymore:

http://www.tube-tester.com/sites/nixie/data/IN-19A/in-19a-l-k.jpg

Weird font, don't know if it is supposed to be upper or lower case ;-)

Jens

[Mich...@aol.com]

John,

 

I thought about Tires as well.  Funny you brought it up.

 

So you know, we are in the 21st century.  At least most of us.  :)

 

Michail

[Bill van Dijk]

Upper case. Kelvin is a proper name. Examples:

Ohm
Ampere
Diesel
Etc....

> -----Original Message-----
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> Subject: Re: [neonixie-l] Nixie thermometer in Elektor journal
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[Charles MacDonald]

>> Distance/length: miles/yards/feet for distance but metres/centimetres for building materials (and drawings)

gee, It is just the reverse in Canada, with Km for Distance, but things
like Plywood still come in 4X8 foot sheets to fit on studs spaced at 18
inches.

Small things may come in either, but they make the Kids come to school
with rulers that are ONLY in cm to ensure that they learn that system first.

> My favourite mixed one is tyres - for example, P225/60R17. That's a 225 millimeter wide tyre for a 17 inch wheel,
> with a 60% aspect ratio. That's just nuts.

That is a work in progress, in the 1960's Tires were sized line 7.50X14
(7 and a half inches on a 14 inch wheel.)

--
Charles MacDonald Stittsville Ontario

cm...@zeusprune.ca Just Beyond the Fringe
http://users.trytel.com/~cmacd/tubes.html

[Charles MacDonald]

On 12-07-04 02:59 AM, Frank Bemelman wrote:
> If we keep supporting Fahrenheit you poor guys never
> get rid of it ;-)

When Canada "went Metric" there was a change of Government who decided
that " the freedom to measure is a measure of your freedom" and so they
backed away from some of the plans. We can still buy a 454g package of
Butter for example but not a half Kilo.

> Next items on the agenda is 60Hz for Europe

If you are going to make the change why not go to 400Hz? Save "Ton" of
Copper in transformers.

> and driving on the right for the English. Let's do it.
> Good for the economy as well...

Countries who have switched found it good for the Auto Body repair
business for a few days. Actually the Brits, OZ and New Zelland and
Japan drive on the left, so it is not just the UK.

--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
http://users.trytel.com/~cmacd/tubes.html

[Tobias]

My preferred approximation from F to C would be dividing by two but
still taking the 32 into consideration...

What I can't quite understand about the Imperial system is why they
decided to go with 3, 12 and 16.
I.E. 12 inches for a foot, 3 feet makes a yard. And 16 oz a pint. On
top of that all the fractions are 2-related. 1/2, 1/4, 1/8, 1/16. Why
not just 10, 100, 1000!?

My biggest embarrassment is to go to a hardware store, stop in front
of the wrenches cabinet and start making mental math just to find out
what is the next bigger size after finding out the one I have in my
hands is a little bit too small! hahahaha

Forget going from square inches to square feet in less than 2 seconds!

Anyway, in Brazil we sell tires just like in USA. Bronze and Stainless
Steel are sized in inches. Mild and special application Steel are in
Metric. Same for Plastics.
All the first big companies came from Germany or Italy (metric) or
England and US (imperial). The country had no regulations at the time
and we got stuck with both! =)


Tobias

On Jul 4, 10:22 pm, Charles MacDonald <cm...@zeusprune.ca> wrote:
> >> Distance/length: miles/yards/feet for distance but metres/centimetres for building materials (and drawings)
>
> gee, It is just the reverse in Canada, with Km for Distance, but things
> like Plywood still come in 4X8 foot sheets to fit on studs spaced at 18
> inches.
>
> Small things may come in either, but they make the Kids come to school
> with rulers that are ONLY in cm to ensure that they learn that system first.
>
> > My favourite mixed one is tyres - for example, P225/60R17.  That's a 225 millimeter wide tyre for a 17 inch wheel,
> > with a 60% aspect ratio.  That's just nuts.
>
> That is a work in progress, in the 1960's  Tires were sized line 7.50X14
> (7 and a half inches on a 14 inch wheel.)
>
> --
> Charles MacDonald                 Stittsville Ontario

> cm...@zeusprune.ca              Just Beyond the Fringehttp://users.trytel.com/~cmacd/tubes.html

[JohnK]

I have an old 'condenser' marked in cm [centimetre/centimeter].
One recent doc explaining this early use of centimeter ...
http://web.mit.edu/sahughes/www/8.022/lec06.pdf
"In cgs units, we measure charge in esu and potential in esu/cm. The unit of
capacitance is thus just the centimeter!"

jk

----- Original Message -----
From: "John Rehwinkel" <jre...@mac.com>
To: <neoni...@googlegroups.com>
Sent: Thursday, July 05, 2012 3:46 AM
Subject: Re: [neonixie-l] Nixie thermometer in Elektor journal

...clip.....

Agreed! As I got into electronics at an early age, I was already familiar
with the prefixes (pico, micro, milli, kilo, mega, and so forth). For some
reason, "nano" seemed to get left out for a while (as "pico" did, back in
the days when a 200pf capacitor would be referred to as a "200mmf
condenser").

....clip....

[John Rehwinkel]

>> Next items on the agenda is 60Hz for Europe
>
> If you are going to make the change why not go to 400Hz? Save "Ton" of Copper in transformers.

And smaller capacitors, less lamp flicker, easy inductive chargers, and all sorts of good things. There's been some research on electrical effects on living tissue, and it
turns out that the 50-60Hz range is actually one of the more damaging ones, as luck would have it. 400Hz would be a big
improvement in that respect as well.

I've heard objections that 400Hz has a shorter wavelength, and would make long distance power transmission more difficult,
but it turns out that doesn't necessarily apply, as much long distance power transmission is done via DC these days, now that
high-powered silicon is available to convert between AC and DC.

And half-wave rectified 400Hz makes a dandy nixie power supply - flicker is much less of a problem. (to drag this thread
somewhere back on topic)

- John

[Tidak Ada]

Mystery of the small K is solved: The tubes is developed to use in Cyrillic.
In Cyrillic the lower case k has the same shape as the upper case K but is
smaller [ http://www.hts-homepage.de/Suchen.html }.

But what does it matter if you use it as a K in your thermometer ?

Further: The IN-19B has an F, but unfortunately not in combination with ° It
is also missing the %. Up to you to use both the tubes if you insist to show
your temperature in F....

[jb-electronics]

That is funny, I once read an old scientific paper where they talked
about capacities measured in centimeters and I was very confused because
I am used to SI. Then I remembered the formula to calculate the capacity
(you know, C = e0*e*A/d) and thought: Hey, they might be using a system
where the e0 is set to unity, and so it was... ;-)

Jens

[Nicholas Stock]

If you want a pre made nixie thermometer I saw the following on the bay...

Item number 280914573855 

I've been tempted, but am not a fan of lacquered oak....:-)

Cheers,

Nick

Sent from my iPhone

On Jul 3, 2012, at 7:45, "Huggermugger" <hugger...@pastisch.se> wrote:

If you join the Elektor Club (no costs) you get 10 Elector pesetas and can buy the article for that amount.

 

Magnus

----- Original Message -----

From: Dave

To: neoni...@googlegroups.com

Cc: Huggermugger

Sent: Tuesday, July 03, 2012 4:43 PM

Subject: [neonixie-l] Re: Nixie thermometer in Elektor journal

Has anyone downloaded and read the .pdf?
Is there anything of special note in it that can't be gleaned from the PCB silkscreen and BOM?

The pic hex file seems to be in the source zip file.  This should allow for a direct creation of the needed pic and for those with the correct compilier setup the ability to change the code to display F instead of C.

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[Lucky]

I hadn't even thought about tire sizes...
and leave 'our' 50hz alone haha, out of interest though this is from the Institute of Electrical and Electronics Engineers (IEEE)  "There is speculation that the value of 50 Hz was chosen in Europe as being an element in the metric “Series of Preferred Numbers,” proposed by the French army engineer Charles Renard in the 1870s. Indeed, the R10 series, consisting of the following rounded values 10, 12.5, 16, 20, 25, 31.5, 40, 50, 63, 80, 100...See so we went with metric way back! Now to go and grab my 'yard stick'

"So you know, we are in the 21st century.  At least most of us.  :)" That's why I said 20th century! (Tongue in cheek)

[Mich...@aol.com]

But it's Celsius (even though the picture shows Fahr)  :(

 

Michail

[Gelu Burla]

I can ensure you that both versions are available (because I'm the designer of this thermometer :) ).

Gelu

---

From: "Mich...@aol.com" <Mich...@aol.com>
To: neoni...@googlegroups.com
Sent: Thursday, July 5, 2012 7:14 PM
Subject: Re: [neonixie-l] Re: Nixie thermometer in Elektor journal

[Huggermugger]

Wow!! Really! Cool!!!

 

Magnus

[Nicholas Stock]

Gelu, have you thought about offering the thermometer as a kit without the base? If you did, I'd purchase one....:-)

Cheers,

Nick

Sent from my iPhone

[Gelu Burla]

I didn't ... as because there are some calibrations procedures required and I'm thinking that these cannot be handled by every customer.

Regards,

Gelu

---

From: Nicholas Stock <nick...@gmail.com>
To: "neoni...@googlegroups.com" <neoni...@googlegroups.com>
Sent: Thursday, July 5, 2012 8:05 PM

[electrofish]

Hi
sorry for opening an old post (2012?) but I couldn't see any others and didn't think it with opening a new thread.
I'm not the smartest hobby electronics person but I do enjoy tinkering : )
I have been building one of these to add to my small (so far) collection of nixie clocks etc.

I have the main pcb finished and need to mount the sensor to it's pcb.
Because it is smd I want to use the 'heated skillet and solder paste' method but I am not sure which way to orientate the chip to the board.

Can anyone advise please particularly if they have a photo of one?  I consider myself to be Kinesthetic as I learn and understand better by watching rather than reading or hearing hence the photo would be good.

Thanks in anticipation
John

[John Rehwinkel]

> sorry for opening an old post (2012?) but I couldn't see any others and didn't think it with opening a new thread.
> I'm not the smartest hobby electronics person but I do enjoy tinkering : )
> I have been building one of these to add to my small (so far) collection of nixie clocks etc.
>
> I have the main pcb finished and need to mount the sensor to it's pcb.
> Because it is smd I want to use the 'heated skillet and solder paste' method but I am not sure which way to orientate the chip to the board.

This is the one with the SHT21 sensor on the little daughter board? The NC pins are pins 3 and 4, and
the unconnected pads are the ones toward the through-hole pins. To put it another way, the notch (cut
corner) on the die pad on the bottom should point away from the through hole pins, and the sensor
opening on the top of the chip should point toward the through hole pins.

> Can anyone advise please particularly if they have a photo of one? I consider myself to be Kinesthetic as I learn and understand better by watching rather than reading or hearing hence the photo would be good.

I don't have this kit, so I can't take a photo, but if it would help, I can make up a diagram showing the placement
of the chip.

- John

[Tidak Ada]

There are several makes of the SHT21 one is fitted on a small SMD print, but
an other on has an elongated print with header pins. Further there is a
Arduni compatable and an I²C compatable type.
I am busy to re-develop the original design to extend it with a real time
clock as a reference for shut off the nixies at night a nightly scan of the
nixies to avoid cthode poisoning, a PIR sensor to activate the hv when a
person enters the room or unit at darkness. Fianlly I use the more charming
IN17 instead of the IN14's that have became scarse and expensive. The high
voltage will be derived from the more efficiënt and smaller Taylor supply.
The sensor comes outside the case to get a more reliable read-out (no
warming up by the components inside) or in a 'tunnel' with mechanic
ventilation.

eric

-----Original Message-----
From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On
Behalf Of John Rehwinkel
Sent: zaterdag 10 mei 2014 13:57
To: neoni...@googlegroups.com

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[John Sturgeon]

Eric

many thanks for you reply.  I replied to John Rehwinkel so you can see why it took a while to respond.

Your design sounds exciting and another addition to my collection when you are finished : )

Regards

John

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[electrofish]

John
many thanks for your reply.  Sorry for not answering straight away but a small matter of my daughter's wedding on Saturday kept me occupied.

OK  Something happened to the original reply and all I did was copy something else, so here goes a again

I have attached a phot taken with my USB microscope with the sensor placed, not soldered on to the small pcb.  Hopefully That matches your description.
I shall remove the cap before reflow.

Regards
John

[electrofish]

It's not a good day for my internet connection so the reply went haywire before I could attach the photo
Third time lucky

[petehand]

I had a bit of trouble finding the SHT21 in the US - all I could find from Sensirion was a Parallax module at $43 - but the SI7020-A10 from Silicon Labs appears to be an exact equivalent for $3.50.

[electrofish]

I did to.  I'm in the UK and the only supplier I could find was Farnell at a whopping £18.83 but now they are for sale at £2.91.
Depressing as the first I bought I destroyed : (

I think an email to Farnell is in order to find out why the price difference.
Regards
John

[Tidak Ada]

eBay shows enough of them here an example : # 320724594666

 

I will advice to get the complete datasheet first. Here the website: [ www.sensirion.com ]

 

eric

---

From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On Behalf Of electrofish
Sent: woensdag 14 mei 2014 11:07

To: neoni...@googlegroups.com
Subject: Re: [neonixie-l] Nixie thermometer in Elektor journal

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[electrofish]

Emailed Farnell.
Farnell came back and said " Sensirion have reduced significantly the pricing on this part to all the market last month"
So £2.91 it is then
Regards
John

[Tidak Ada]

Roland,

 

Kijk even naar het bericht op NEONIXIE. Gigantische prijsverlaging van de SHT21!!

 

Grtz.,

 

eric

---

From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On Behalf Of electrofish

Sent: woensdag 14 mei 2014 15:00

To: neoni...@googlegroups.com
Subject: Re: [neonixie-l] Nixie thermometer in Elektor journal

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[Tidak Ada]

Sorry, had to be sent to a friend

 

e.

---

From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On Behalf Of Tidak Ada
Sent: woensdag 14 mei 2014 15:32
To: neoni...@googlegroups.com
Subject: RE: [neonixie-l] Nixie thermometer in Elektor journal

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAEaKCaJdzB1IopKWR1Zu8YMBAAAAAA%3D%3D%40zeelandnet.nl.

[John Sturgeon]

That's OK.  At least someone enjoyed the good news LOL

John

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[electrofish]

Update:  Now working perfectly.  Thank you again for the advice.
I must admit to being hyper nervous about the reflow on an electric skillet but it worked.  Not bad for a first effort and a £15 skillet, even if I say so myself.
I also got a very generous refund on the two sensors I bought before the price decrease from Farnell : )  How good is that!
Excellent customer service.
Regards
John