Which is why you use a string of them in series for this sort of thing.
With appropriate insulation, I saw glass tube used in a physics lab.
On Sun, 31 Oct. 2021, 12:31 am 'John Rehwinkel' via neonixie-l, <
neonixie-l@googlegroups.com> wrote:
> Most DMMs have 10Meg input impedance, so you can put
Sorry I see that they were base 12. Decimal hours? But clocks count hours
from 1, not zero.
On Fri, 3 Sep 2021, 9:52 a.m. Tom Harris, wrote:
> What were these tubes used for? Base 11 is not used much.
>
> On Fri, 3 Sep 2021, 12:00 a.m. Paul Andrews, wrote:
>
>> The GR-B ca
What were these tubes used for? Base 11 is not used much.
On Fri, 3 Sep 2021, 12:00 a.m. Paul Andrews, wrote:
> The GR-B can also display two digit numbers (1 thru 10)
> https://www.nixies.us/bwg_gallery/grb/
>
>
> On Thursday, September 2, 2021 at 2:29:39 AM UTC-4 tntm...@gmail.com
> wrote:
>
>
Can anyone tell me what microcontroller it uses? The manual didn't say:)
Tom Harris
On Fri, 9 Jul 2021 at 08:22, gregebert wrote:
> Well, mine arrived today nicely packaged, with no instructions. I'm glad
> the version I bought already had the PCB assembled. The basic as
gt;>>
>>>> Greetings,
>>>>
>>>> I am doing a Hackaday project on my enormous FLW build, and I would
>>>> like to know the history of the FLW concept, I know Raymond Weisling
>>>> invented them, is there an authoritative history of t
is there an authoritative history of them? In particular, who came up
>> with the idea of using a word association database to generate the words?
>>
>> Tom Harris
>>
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the words?
Tom Harris
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https://hackaday.com/2020/07/23/384-neon-bulbs-become-attractive-display/
knew about the issues!
Tom Harris
On Thu, 6 May 2021 at 08:40, gregebert wrote:
> So if the display was static, using only pulses to turn bulbs on or off,
> then it was most likely all bulbs were resistivel
Wow each lamp was individually pinned out. How did they drive these? Big
diode matrix?
Tom Harris
On Thu, 6 May 2021 at 06:27, Tidak Ada wrote:
> There was ever a Mullard ZM1251. A 5×7 neon dot matrix at the size of a
> stamp.
>
>
>
> eric
>
>
>
> *Van
Thanks for the ideas but it was definitely static with the pulses just used
to turn the lamps on or off. After that they would keep their state
indefinitely.
Tom Harris
On Thu, 6 May 2021 at 01:21, gregebert wrote:
> If it was pulsed-DC, then it probably was simple multiplexing.
>
&g
Can someone please help me out, I remember an article from some scanned
book from the 60s where a set of neon lamps were connected in a matrix with
clever biasing and pulses on the row & column could toggle an individual
lamp. I thought it was the GE glow lamp manual but it seems not.
--
You rece
I had an old diathermy machine. First time I've ever seen a switch labelled
"coagulate" and "cut"!
That one is beautiful. The 3 indicator lights look like a 1950's robot face.
Tom Harris
On Thu, 13 Aug 2020 at 05:10, Jean-Pierre G wrote:
> Hi there,
>
>
Try the ZXCT1009. It's a current mirror on a single 3 pin package intended
for high side current sensing.
https://www.diodes.com/assets/Datasheets/ZXCT1009.pdf
The output voltage can go straight into the ADC input of a microcontroller.
Tom Harris
On Tue, 21 May 2019 at 10:08, greg
Interesting how they designed in the old days. A double sided board but
still had a wiring loom. Even though there looks like lots of space for
tracks left.
On Sun, 12 May 2019, 3:06 a.m. Mac Doktor, wrote:
>
> > On May 11, 2019, at 12:39 PM, martin martin wrote:
> >
> > Not sure what do do wi
Transient suppressor? But they are gas filled.
On Wed, 10 Apr 2019, 1:47 p.m. 'John Rehwinkel' via neonixie-l, <
neonixie-l@googlegroups.com> wrote:
> Looks like a spark gap or TR switch, but I suppose it could be a nitrogen
> laser.
>
>
> > On Apr 9, 2019, at 11:25 PM, Nicholas Stock wrote:
> >
Where do you get the displays from? They appear rarer than the more exotic
Nixie's.
On Mon, 18 Feb 2019, 3:05 p.m. Shaun Merrigan Just saw an interesting a article about building a 4 digit clock using
> electro-mechanical score reels from pinball machines:
>
> https://www.elektormagazine.com/mag
Are the cheap fluorescent testers on ebay that cost $15 or so and take 4 AA
batteries any good?
Tom Harris
On 13 May 2016 at 10:43, Tom Harris wrote:
> I have several neon transformers that I could use for testing, one with HV
> leads ending in croc clips. I call it Cousin Vinnie,
em to
test fluoro tubes.
Tom Harris
On 13 May 2016 at 09:14, Nick de Smith wrote:
> Not the wrong place at all. There are Neon tube testers, small battery
> powered units, that can test to see it if the tubes are OK.
>
> Where abouts are you located - there may at be a member near
Sorry if this is the wrong group. I have been offered a large quantity of
vintage neon tubes from old signs, "burgers", "restaurant" "cafe", that
sort of thing, together with straight & curved lines. How do I find out the
value? I can test them.
Tom Harris
dium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
<#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
Tom Harris
On 22 April 2016 at 07:24, Jon D. wrote:
> What a disappointment and waste of $153 (shipping included) this was. The
> photos speak to the quality (or
I know, just a funny typo. Tesla wouldn't have been the first
super-intelligent scientist (Nobel prizewinner!) to descend into
crack-pottery. He's still my favourite Serbian :)
Tom Harris
On 21 January 2016 at 08:31, Quixotic Nixotic
wrote:
> On 20 Jan 2016, at 20:52, Tom
Funny story about your mate and TV producers. I used to sell secondhand
books and I was asked a few times for a free loan of a book for a TV show.
Get real! Good on your mate for maintaining his integrity and refusing to
lie.
Tom Harris
On 12 August 2015 at 19:02, Quixotic Nixotic
wrote
Ever read Dr. Seuss? In one of my favourites "Dr. S's Sleep Book" we have a
special clock:
But I do know this clock does one very slick trick.
It doesn’t tick tock. How it goes, is tock tick.
Looks like yours slipped back in time to the 1960's and visited the good
Do
Melburnians!
Tom Harris
On 21 July 2015 at 09:38, Nicholas Stock wrote:
> That'll keep you up at night...;-)
>
> Nice work.
>
> On Mon, Jul 20, 2015 at 4:20 PM, Tidak Ada wrote:
>
>> Hi All,
>>
>> At a Dutch forum somebody 3D printed his own flip-over 7
Now that's just bragging!
Tom Harris
On 9 June 2015 at 09:03, David Forbes wrote:
> On 6/8/2015 2:02 PM, Tom Harris wrote:
>
>> The goal is indeed to make large discharges in glass. As well as make a
>> vacuum cannon (look it up), the most impressive thing to do whe
ghs about
35Kg, 10Kg of which is the casing and belt guards! The motor runs so
sweetly you can hardly hear it. Besides who would name a product line
"Speedivac" now?
I have no idea about level of vacuum, I just want to play around. This is
only a single stage pump, so it will not go very de
Superb. This is all the information I need. My pump is similar enough that
I can tackle the job without worrying that I am going to break something.
Some new oil is on order from Ebay, I can't wait to start! Thanks so much,
this list is chockers with helpful folk.
Tom Harris
On 9 June 20
I couldn't find anything online on servicing a vacuum pump. I might have to
perform my generic service routine. Take the thing apart, clean everything,
replace anything worn, lubricate anything that moves, put back together. I
do remember from my lab days that vacuum systems use silicone grease as
Thanks for taking an interest. It's a Speedivac Single Stage model ISC50B.
On 08/06/2015 12:20 PM, "David Forbes" wrote:
> Make and model?
>
> On 6/7/15 6:28 PM, Tom Harris wrote:
>
>> Greetings plasma worshippers!
>>
>> I have acquired a 50'
Greetings plasma worshippers!
I have acquired a 50's vintage lab oil vacuum pump. It probably needs a
clean and new oil. Can anyone give me any pointers on servicing it before I
just take it apart?
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That's why I like Python too!
Tom Harris
On 28 May 2015 at 10:36, Cqr wrote:
> Stay off those meds I like the result :)
> I'll put it up on github once sanitized a bit for public consumption, but
> most of the magic is from the twython library and python itself which make
Thanks for the link. That's a lot of motors!
Tom Harris
On 28 May 2015 at 09:49, David Forbes wrote:
> Not an obsolete display technology, but very interesting for its fur
> pixels...
> https://fnews.com/an-interactive-fur-mirror-by-daniel-rozin-u032
>
>
> On 5/27/2
Put your code up online. Then we can have a network of such things. I would
use a large flipdot display in a semi-public place like a makerspace.
People can use the obsolete display technology of their choice! Smoke
signals even! Semaphore! Morse code! Perhaps it's time for my medication...
n interesting inverse position
would be to only use dirty words :)
As to displays, I have some huge 8" high flipdot 5x7 matrix display that
came from highway signs. I am prototyping a driver circuit, and I want
something impressive for them to display. Sorry no glowing glass, but
flipdots ar
To answer my own question Evil Mad Science Labs have a five letter clock,
but it only displays random words, not walking the tree of word
associations like a real FLW clock.
Tom Harris
On 15 April 2015 at 20:47, Nick wrote:
> I saw an Italian one a few years ago using B7971s...
>
>
Everyone on this list has heard of four letter word clocks. But a clock
with seconds has 6 digits. Has anyone ever made a six letter word clock?
Tom Harris
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You can own one of Clifford Stoll's remarkable creations from
http://www.kleinbottle.com/
Quite inexpensive if you have ever tried scientific glassblowing.
Tom Harris
On 25 March 2015 at 09:05, jb-electronics
wrote:
> Topology at its finest -- I am going to show this to my maths p
You can't fill a Klein bottle with anything as there is no inside to fill.
Anymore than you can colour in a Moebius strip with two colours without
them touching.
Tom Harris
On 25 March 2015 at 08:36, Quixotic Nixotic wrote:
> Yes, it's another Firesign Theater quote. But I am t
rate the
functions.
Tom Harris
On 5 February 2015 at 22:48, Joe Croft wrote:
> Sweet clock, I take it you don't have it in your bed room hehe ;)
>
> -joe
>
> On Thu, Feb 5, 2015 at 4:40 AM, Morris Odell
> wrote:
>
>> Electromechanical nixie clock:
>>
Gregebert, do you have anything on the web on your neon clocks?
Tom Harris
On 16 January 2015 at 07:47, gregebert wrote:
> In the spirit of this group, a large array of NE-2 bulbs would be a neat
> project. I've already used opto-triacs on my big clock; they should work
>
did before I gave it a hard time!
Tom Harris
On 24 September 2014 17:51, Tidak Ada wrote:
> Such arrestors actually have to withstand kA's for a short discharge!
> Look at your overvoltage protector you use (hopefully) for your computer
> and peripherals. I have here a Belkin cont
More on the arrestor, I tried it this morning and it has got better
overnight, it just strikes at 290V, before it was not striking reliably at
300V. It must have been tuckered out. It looks like it is recovering slowly.
Tom Harris
On 24 September 2014 08:25, Tom Harris wrote:
> Well I h
another one with a more moderate current and see how it lasts.
Tom Harris
On 24 September 2014 08:19, gregebert wrote:
> I'm curious how long these devices would last if they were operating
> continuously at a low current (just enough to get a visible discharge).
>
> D
Thanks, I'll check if it ionises the air by bringing it near a spark gap
just off arcing over, an excellent test for radiation, and far more
spectacular than discharging an electroscope as a demonstration of
radioactivity.
Tom Harris
On 23 September 2014 20:44, Tidak Ada wrote:
>
I used 10K, but they are built to take a lot of current, so I could
probably drop it down. The electrodes are probably tungsten. I'll have a
photoshoot of the lot, as I ended up with a lot of different sizes. I might
go back and score the bakelite mounting clips as well.
Tom Harris
rane in to lift
it out. There are probably also some driver boards, but all mixed up in 30
years worth of junk. I just stuck some on Ebay to see how they went. We
also have some single element flipdisc modules, which I have never seen
before.
Tom Harris
On 18 September 2014 03:15, 'threeneuron
www.ebay.com.au/itm/291244635089
We found a box of them!
Tom Harris
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green/yellow ones from the 90's that my mate who sells LEDS
refers to as "phleghm colour" :).
Tom Harris
On 25 August 2014 01:31, David Forbes wrote:
> A tad price at $450.
>
> I have one of these in its original bus mounting frame, but haven't gotten
> it runni
. Your centre is in the middle of the marks, which if they are close
together is easy to get. Simple.
Tom Harris
On 25 July 2014 19:42, petehand wrote:
> Is THAT what the V-shaped thing is for? I'm indebted to you sir - I never
> knew what it was for.
>
>
>
> On Tuesday, Ju
apparatus for preparation of "specimens" shall we
say...?
Tom Harris
On 15 July 2014 13:01, Morris Odell wrote:
> Thanks Tom,
>
> No it's a static yoke which is 3 phase delta wound and excited with
> suitable waveforms generated by a micro. It's the original 90
Very nice Morris. The last display like this I saw had a rotating yoke with
slip rings, so if yours has one the power transformer must be a real
howler. It sounds like 400Hz too.
Can't wait to see it completed.
Tom Harris
On 14 July 2014 19:02, Morris Odell wrote:
> Hi all,
>
the
industrial loads are off) can certainly make the grid notice.
Tom Harris
On 16 April 2014 17:25, Dalibor Farný wrote:
> I thought that lighting does a minor power consumption compared to
> industry that runs 24/7, so switching our CFL/LED bulbs would not have
> any effect ;-)
> A
they do
something with it, like rebuilding the oldest working digital computer in
the world. And if that isn't amazing, I don't know what is.
Tom Harris
On 6 February 2014 21:18, Alex wrote:
> I went up and visited Bletchley in around October last year and, until I
> got th
Use SPI protocol, then you only need 3 optos with simple drivers, no
bidirectional stuff. For isolation, use cheap jacketed polymer fibre optic,
about $1 a metre, with matching detectors & transmitters $2 each or so.
Tom Harris
On 1 December 2013 05:13, Grahame Marsh wrote:
>
> I
clock in the front window that received the LF signal from Rugby.
Tom Harris
On 24 November 2013 03:03, John Rehwinkel wrote:
> > Wow, a subject area I still have some interest in :)
>
> And I as well!
>
> > I began collecting antique Christmas lamps in the 60's, and co
Price?
On 30 July 2012 22:36, Vitaly Nart wrote:
> New position for today 36 IN-18 ( one year of production, factory box)
> Free shipping.
>
>
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