I can see these posts, if that helps.
On Tue, Sep 19, 2023 at 1:29 PM chuckrr wrote:
> I wonder if this works? My posts have not been showing up for a long
> while now.
>
> -Chuck
>
>
> Original Message
> From: "'neonixie-l' via neonixie-l"
> Sent: 9/19/2023 11:59:27 AM
> To: "neoni
I was very disappointed in the film. It was not historically accurate.
The two bombs were of different designs and the reactors were different and
built in parallel to hedge their bets.
The book "The Life and Times of a Technological Fixer" was more interesting
to read than watching the film.
My fr
Except they are not nixie tubes. They are Incandescent 7 segment displays.
It says so on the watch "Numitron"
On Thu, May 11, 2023 at 10:08 PM martin martin wrote:
>
> https://www.ebay.com/itm/195748248206?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=eo3lWCoqQIe&sssrc=2047675&ssuid=PHyjOWfuSxi
There is a saying "if it aint broke don't fix it" but unfortunately Ebay
has improved things until they are useless - to me anyway, I hardly use it
anymore.
Windows 11 is also approaching useless and is making paperweights out of
computers. I keep going back to Win7 if I want to get work done.
On
John; hang onto those treasures.
Maybe reward a good friend by setting something aside that your son can
deliver. Your family may like to keep a few items to remember you. After
all this is part of you.
I have a friend in long term care who knows his collection of vacuum tubes
are safe with his bro
On Oct 28, 2021, at 1:26 PM, peter bunge wrote:
>
>
> Would anyone care to sell me an end view Numitron (DTF104B) to add to my
> vintage digital working display?
> I would also like a DIP 7 segment incandescent display, or anything
> interesting not in the picture. Nothing to
I built a digital tach for a Corvair many years ago and wrote it up for
Radio Electronics.
You can see the article here in Radio Electronics Apr 1973
https://worldradiohistory.com/Archive-Radio-Electronics/70s/1973/Radio-Electronics-1973-04.pdf
On Sat, Aug 14, 2021 at 7:33 PM David Forbes wrote:
It's a charge pump. VR1 fixes the pulse amplitude so the tach is not
sensitive to battery voltage. C2 determines the charge per pulse and the
meter averages the current because it cannot follow the pulses fast enough.
R6 calibrates it.
I suggest putting a 'scope on it and follow the pulses from the
Why are you using a 324 Op Amp? Older OpAmps are asking for problems with
instability and common mode input range as well as output swing limits.
I suggest you look at something like the TLV2371 series that is available
as single, dual, and quad. Inputs and outputs are rail to rail.
Yes, connect as
I would be very careful letting your kids play with Nixies. I'm not saying
don't let them but find low energy power supplies to run them.
You will need 200 volts or more from a switching power supply. Do not use a
transformer or line voltages.
It would be safer to let them try 7 segment LED displa
transistor
version as well.
Peter
On Thursday, February 18, 2021 at 10:27:29 AM UTC-5 peter bunge wrote:
> I tried another Dekatron but I'm not sure what it is, and it doesn't work.
> The glow just flickers back and forth on adjacent elements.
> This tube looks a bit like the
I tried another Dekatron but I'm not sure what it is, and it doesn't work.
The glow just flickers back and forth on adjacent elements.
This tube looks a bit like the GS10C/S but has no markings, has a metal
base, and the end is domed instead of flat. It fits the same socket and
appears to have guid
I tried my new circuit with the optocouplers using 270k for R5 & R6 and 1k
for R3 & R4.
It works within the limits of +0v and about -22v. It is interesting that
the other circuit did not work for low + bias. It must be the slower
positive edge as someone mentioned. I will use about +30 and -30v, wh
Those values were left over from the 5v circuit. I was more concerned with
the level shifting from the PIC at 0 to +5v.
Peter
On Mon, Feb 15, 2021 at 6:48 PM Jon wrote:
> I'd had a similar thought about increasing the bias resistors - it's not
> necessary to run so much current (5mA) through tha
You are absolutely right. 5v was not high enough despite Ronald's and my
confirmation that it would work.
I am changing to +25v and -25v and will have an optocoupler with the diode
driven from the 5v PIC and the transistor at the bottom of the resistor
between the two power supplies. It keeps it si
Having finished the Amperex 8453 display I started on my Dekatron. Thanks
to all for the suggestions.
I read up on Ronald Dekker's clock project
https://www.dos4ever.com/decatron/decatronweb.html
and decided against a direct drive from a 74141 because, even if it was
practical, it would not loo
rs by the glass where I get
>>>>>>>>>>>>>> lots of
>>>>>>>>>>>>>> random flashing.
>>>>>>>>>>>>>> Remember that the really bad one works perfectly with
>>>>>>>>&
t;>>
>>>>>>>>>>>>> On Thu, Feb 11, 2021 at 2:10 AM Dekatron42 <
>>>>>>>>>>>>> martin@gmail.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>
gt;>>>>>>> cathode line to verify the ripple is not excessive ? Rk and Ck
>>>>>>>>>> create an RC
>>>>>>>>>> filter around 77Hz, and the line is 50-60Hz, so there could be some
>>>>>>>>>> ripple.
>
gt;>>>>>> circuit.
>>>>>>>>> [image: 8453 Cct.JPG]
>>>>>>>>>
>>>>>>>>> On Wed, Feb 10, 2021 at 11:12 PM gregebert
>>>>>>>>> wrote:
>>>>>>
21 at 7:22:25 PM UTC-8
>>>>>>>> bung...@gmail.com wrote:
>>>>>>>>
>>>>>>>>> I think you are wrong. The literature explains this tube is
>>>>>>>>> designed to be driven by 5v logic and it does work. The steering
ng the hand drawn notes of the designer. I think maybe I needed
>>>>>>> to
>>>>>>> have C1 directly on the socket pins and will try that tomorrow.
>>>>>>> Thanks for your interest though but you are thinking Nixie Tubes,
>>>>>>> this is a special tube with steer
e hand drawn notes of the designer. I think maybe I needed
>>>>>>> to
>>>>>>> have C1 directly on the socket pins and will try that tomorrow.
>>>>>>> Thanks for your interest though but you are thinking Nixie Tubes,
>>>>>>> this is a special tube
t;>
>>>>>> That schematic is so wrong in so many ways. You need high voltage
>>>>>> transistors operating the tube cathodes.
>>>>>>
>>>>>> You need high resistance drving the transistor bases. You need a
>>>>>> bu
ich in turn drives the transistor base. Only then would I
>>>>> dare to use the 4028to operate the buffer, which in turn operates the
>>>>>
>>>>> transistor base via appropriate high resistance. That is the only
>>>>> sure fir
>>> resistor, which in turn drives the transistor base. Only then would I
>>> dare to use the 4028to operate the buffer, which in turn operates the
>>>
>>> transistor base via appropriate high resistance. That is the only sure
>>> fire way I know of to att
That is the only sure
> fire way I know of to attain noise-free performance from CMOS logic
>
> driving cold cathode tubes. That schematic there is a noisy deal.
>
>
>
>
>
> Original Message
> From: "peter bunge"
> Sent: 2/10/2021 8:15:21 P
Using the schematic from the data sheet
[image: 8453 Circuit.jpg]
This works with the count moving around but other numbers flash
erratically, especially close to the number that is supposed to be lit.
*When I moved the bottom of C1 to the other side of R1 it works
perfectly. It is rock steady
UDN2981 and there's also a Toshiba version
>>> (TDSsomething). They aren't BCD though - just one pin per segment, so that
>>> might not be any good for your application depending on how many IO pins
>>> you have spare ..
>>>
>>> David
>
I need to drive a single IV12 vacuum fluorescent display from a BCD to 7
segment chip.
I could use level shifters like the CD40109B or CD4504B but they don't have
7 devices in one chip (4 and 6) and only drive 18 volts which might work.
I could use a ULN2803 transistor array with 7 pullup resisto
https://www.ebay.ca/itm/RSQ-KA-2000-Mixing-Amplifier-karaoke/224285782514?hash=item34387971f2:g:~p4AAOSwKwNf3mNg
On Wed, Jan 6, 2021 at 4:23 AM Richard Scales
wrote:
> On behalf of a colleague I am seeking a Karlsson KA2000 in working (or
> near working) condition to purchase as a gift.
>
> If a
p on the power supply, to
> give the same protection that the Zeners in the 74141 give.
>
>
>
>
>
> On Sat, Jan 2, 2021, 6:58 AM peter bunge wrote:
>
>> Question 1. Has anyone tried paralleling two or three Nixies from a
>> single 74141?
>> I am making a working
Question 1. Has anyone tried paralleling two or three Nixies from a single
74141?
I am making a working demonstration with a variety of vintage displays
(Nixie, Dekatron, Numitron, Amperex 8453,etc) that will all count together
from a common clock.
Question 2. The data sheet for the IN16 says
Can anyone remember what the first LED displays looked like?
My first experience was with a 3 digit multiplexed display with bubble
magnifiers. Did these come out before the single 7 segment displays with
bigger digits?
Did Numitron incandescent come out before the LED displays?
--
You received
I bought the older kit from al-truism
https://www.ebay.ca/itm/Oscilloscope-Clock-Kit-OSC4-4-original-vector-design-crt-Cathode-ray-tube-Scope/303740553122?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
It worked without problems using a Russian 6LO1i CRT.
You do require some skill to bu
I don't see how they can be connected, especially the green one with
twisted wires.
Photoshop?
On Thu, Nov 26, 2020 at 8:54 AM Yohan Park wrote:
> I found this picture on spark-tube.com
> The tubes are clearly lit with a UV light from the right side.
> Has anyone ever come across these orange an
e across any original drawings or photos where they
> were shown in use.
>
> /Martin
>
> On Friday, 6 November 2020 20:52:49 UTC+1, peter bunge wrote:
>>
>> Has anyone actually used one of these?
>> Does anyone have a picture of this tube with the magnet installed?
Has anyone actually used one of these?
Does anyone have a picture of this tube with the magnet installed?
Anyone have working schematics?
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>
> On Thursday, 29 October 2020 01:23:14 UTC+1, peter bunge wrote:
>>
>> I searched on this tube and found nothing.
>> Before I spend time designing a circuit to drive it, has any one already
>> done so?
>> I don't mean the circuit in the data sheet, I mea
I searched on this tube and found nothing.
Before I spend time designing a circuit to drive it, has any one already
done so?
I don't mean the circuit in the data sheet, I mean a solid state driver for
the ten starter pins.
Ehat does I.C. mean on pin 6? Or is it N/C as in Not Connected?
--
You
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