to be generated
somewhere. That somewhere is the lead wires. Later tubes had insulating paint
applied to the lead wires to prevent this. It's usually white or green.
David Forbes, Tucson AZ
> On Apr 26, 2024, at 7:29 PM, Leroy Jones wrote:
>
>
> Hello, A while back I was tes
The truly long-life tubes had mercury added. If you see a hazy purple glow when
the tube is lit, it's long life. Solid orange is not so long life.
David Forbes, Tucson AZ
> On Apr 5, 2024, at 6:45 PM, Jasper nagle wrote:
>
> i picked 9 of these up for $90 $10 a pcs for A cloc
offers, I don't know what the market for bulk American style
tubes is like these days, and I'd hate to give 10% to eBay.
I'll also take offers on ~50 of my round Nixie watch kits, partially or
fully assembled.
--
David Forbes
Tucson, AZ
--
You received this message because you are
I know the feeling. Things can spiral out of control.Many years ago I came into some similar red 8x8 LED bricks for a price that seemed too good to be true. Yup, it was. They were very very dim.You can read about the TV set they ended up in, SatanVision, here.SatanVision LED
rather than rolling your own graphics.
That's a nice standard solution that makes sense in this age.
On 2/26/2024 2:12 AM, paulvr wrote:
This is my first post in this forum and I would like to introduce you
to my version of the scope clock. Mainly inspired by the work of David
Forbes and Grahame
Of course there's always the lazy option.
Update your new router to use the same SSID and password as the old one so
everything JUST WORKS (TM).
David
On Sun, 18 Feb 2024, 00:55 Jon D., wrote:
> I am changing ISPs. In trying to changeover my MOD-SIX Lumina WiFi from
> an existing WiF
this is a problem with definitions, “Bulovas...line of
> transistorized clocks ” notwithstanding. But this looks very much like a
> series of logically erroneous inferences when it says “the Telechron 8B03
> employed vacuum tubes.” It did not. But the cabinet looks like a ‘30's
> tub
That's fine. Having an adaptor that can supply more current is no problem.
David
On Sat, 18 Nov 2023, 22:14 GDR GDR, wrote:
> pardon my ignorance here, but would it be ok to plug this into a AC to AC
> adapter 9VAC output but with 1000mA ? meaning does the 300mA output matters
> or
If it's ac it doesn't have a polarity per se.
David
On Sat, 18 Nov 2023, 20:07 GDR GDR, wrote:
> hi there. I recently acquired a Karlsson KA2000 nixies clock, but it
> didn't come with a power plug/supply. the clock label states 9VAC 300mA
> 50/60Hz, which tells me I can jus
logic
Using the ARM MCU and transistors solves the issues with the HV driver ICs
needing 9v and both the STM32 and the esp8266 can communicate with 3v3
signal levels and will be cheaper albeit with higher component count.
David
On Fri, 3 Nov 2023, 11:15 Mike Mitchell, wrote:
> That's basically w
. (Or, if you sacrifice led timings to run your multiplex
interrupt routine, it can glitch the LEDs. ). Chips which have DMA/more
complex peripherals might avoid this.
You might get away with it with certain combinations of things but it was a
bit of a pain for me.
David
On Wed, 1 Nov 2023, 11
Jeff Thomas made such clocks, and I used to make such clocks. But we are/were both Arizonans. Mine were NC640 and NC600. Sent from my iPhoneOn Jun 24, 2023, at 6:38 PM, Zachary wrote:Hello,I was wondering if there was any example of enclosed side-view Nixie clocks that were made with style /
another post.
>
> I have built a Scope Clock based on David Forbes design. I hand wound the
> transformer.
>
> All secondaries, including for the heater are on the same core, so the
> voltage for the heather output depends on duty ratio, frequency and load on
> the other sec
For the longer tubes where the brightness gradient is problematic, the
usual DC-DC converter to get the voltage followed by an H-bridge to
generate an alternating polarity square wave is another option.
David
On Sat, 17 Jun 2023 at 04:29, Richard Scales
wrote:
> Many thanks for all y
realised that
> Teensy 3.6 is impossible to get...
>
> Il giorno sabato 11 marzo 2023 alle 18:41:05 UTC SD ha scritto:
>
>> David Forbes has the schematic on his website, and the firmware on
>> Github. I did not see that Jörg was making kits, in fact he said he didn't
>> wa
Hi. I'll be there soon. Are there any interesting places to find old
electronics?
-- David
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to neonixie-
I built a Nixie tube instrument panel for my Corvair a couple of years ago.
It's a big PC board with a couple dozen 4998 and 5870 tubes, with a
separate control box. It worked very well (no vibration problems or
anything), so I transferred it into my Volvo 544 shortly after I reacquired
the car
I used a PIC 16F microcontroller, and two TD62083 octal Darlington arrays.
Unfortunately, that part is no longer available, and its successor the
TBD62083 is not currently available in the smallest TSSOP package.
On Sat, May 6, 2023, 1:35 PM Zachary wrote:
> I am planning on building a watch
I have read much more garbled schematics. Zoom! Enhance! But seriously,
print it out on a big piece of paper and it should be more obvious. Trace
over the broken lines to see which one goes where. Make your own CAD
layout, print it actual size, poke the device pins through it on some foam
to
I have made a lot of Nixie watches. The battery life depends on how often
the display is activated, and the operating current of the tubes. You can
use an Arduino if you turn it off when not displaying the time, and have a
DS3231 or similar RTC chip to keep time. You can rig a pushbutton and a
pic.
>
> I've put some effort in using the teensy4.x to run the scope clock based
> on david forbes one.
> The teensy3.6 based one is running on my own hardware for a while.
>
> But because of CPU shortage and the use of the teensy3.6 internal DAC's, I
> was curious to get
How many football fields long is that clock? Your pictures don't show the
scale
On Fri, Feb 10, 2023, 5:59 PM Paul Andrews wrote:
> I’ve been slowly making clocks for my stock of Nixie tubes. Thought you
> guys might be interested in a quick write up I posted for a clock I made
> using CD27
They're available now!
I can make a dozen more with my current supplies.
On Fri, Dec 30, 2022, 12:00 PM John DeArmond wrote:
>
>
>
>
> >> On Saturday, 17 December 2022 at 21:55:35 UTC+1 J Forbes wrote:
> >>
> >> They're all gone
>
> Do you think you might do another run anytime soon?
The Nixie can easily be driven by a high voltage, high impedance vacuum
tube logic circuit. The Numitron needs a high current, therefore a
transistor, for each segment, as well as a more complex decoder gate tree.
On Sun, Dec 25, 2022, 9:03 AM Robert wrote:
> I would have thought the Numitron
Yes, these symbol tubes are rare. Dieter's page shows a tube with an HP
part number in addition to the National number, indicating that it may have
been designed for an HP meter. So it's not surprising that datasheets
aren't available.
On Wed, Dec 21, 2022, 10:50 AM Jasper nagle
wrote:
> i
After a long year of not making any due to supply chain issues, I have
finally restarted production of my Cathode Corner Scope Clocks, in both kit
and assembled form.
It's available at my website...
https://scopeclock.com/products/scope-clock-in-clear-plastic-case
Enjoy.
--
You received this
Thanks for posting this! It's not everything needed to figure out the parts
placement, but the schematic diagram is a big step forward.
Good photos or scans of both sides of the bare PC board are needed to
figure out which parts go where.
On Mon, Dec 12, 2022 at 7:47 PM Thugwold wrote:
> Long
board
(both sides) and a list of the parts that you have to david at
cathodecorner dot com, I can try to piece together the puzzle of which
parts go where.
http://www.electricstuff.co.uk/nixcct.pdf
On Mon, Aug 29, 2022 at 7:09 PM Rob Bailey wrote:
> Ages ago, I purchased Jeff's Krusty Kl
Rob
Sorry for not getting back to you sooner. Our telescope startup has been a
real bear this year.
I looked for data files for the Jeff Thomas watch, but didn't find any,
either in my disk archives or my manila folders.
I could probably make that watch run, given the board, the parts and some
if needed.
David
On Wed, 23 Nov 2022, 19:37 Moses, wrote:
> I assume you need that particular package.. yea, I don't see any stock
> anywhere.
>
> When I designed my last clock I went with the HV5222, mainly because there
> was another part.. the HV5122 that was pin compatible (al
I have some data sheets. I'll see if I can scan them this weekend.
On Sat, Nov 5, 2022, 1:47 AM Dieter Waechter wrote:
> Hi,
> does anyone have information about "Digicator" incandescent readouts
> made by Discon Coroporation?
> Datasheets maybe?
> See ad attached.
> Best regards
> Dieter
>
>
They had a short lifetime so they got replaced earlier in the lifetime of
the product. In some cases the dead tubes were put into the boxes of their
replacement tubes instead of being thrown out like they should have been.
At least that's the conclusion I came to when buying thrm on eBay 20 years
It can indeed.
For single digit tubes the brightness gradient isn't usually noticeable but
for the multidigit ones eg the one from the adafruit iceclock, it certainly
is.
David
On Wed, 14 Sept 2022, 10:42 Adrian Godwin, wrote:
> Using DC for the filament means there is more accelerat
Hi. I am certain that my scope clock designs were some of your inspiration.
However, it is impossible to see what your circuit looks like because the
schematic diagram does not show the transformer windings, and none of the
transistors are shown as transistor symbols. Also none of the chips are
I have a bunch of 1DP1 and 1EP1 CRTs. They are also rather small, being
23mm and 30mm respectively. They were used as signal monitors in test and
communications equipment.
On Thu, Sep 8, 2022, 1:20 PM gregebert wrote:
> I bought a dozen of these a few years ago for a future project, and I've
>
I think I have that information on my home computer. I'll be home Friday.
On Mon, Aug 29, 2022, 7:09 PM Rob Bailey wrote:
> Ages ago, I purchased Jeff's Krusty Klown nixie watch kit [two, in fact]:
>
> http://www.nixie.dk/~jthomas/watch.html
>
> Of all parts of a kit to lose, I lost the
Back in the good old days when sockets were made by military suppliers,
they were designed well and made according to all the design details.
Later, these good sockets got copied by manufacturers who didn't understand
what details to copy, so they got progressively worse over the years.
Fast
I have installed thousands of Nixie tubes with wire leads into sockets.
The first step is to use tweezers to bend the leads so that the ends are
where they need to be to plug into the socket. I usually do this using the
plastic lead spacer as a guide. I cut the leads just enough longer than the
What kind of sockets are you using? I've always soldered the IN14s
directly to the PCB, so curious to see what you're using.
David
On Thu, 25 Aug 2022 at 21:13, Mac Doktor wrote:
>
> On Aug 25, 2022, at 3:56 PM, Nicholas Stock wrote:
>
> Cut the legs in a spiral fashion so
just popped the back off a c.1960 five tube radio made by Monarch in
Japan, and it is full of Matsushita tubes.)
It's an interesting question.
On Sat, Aug 20, 2022, 5:15 PM Charles MacDonald wrote:
> On 2022-08-20 14:25, David Forbes wrote:
> > Max,
> > Thanks for the photo.
Max,
Thanks for the photo. These JRC tubes look very similar to Japanese
Burroughs B-5870 tubes. It's likely they were made in the same factory, but
I don't know whose factory it was.
On Fri, Aug 19, 2022, 3:19 PM Max DN wrote:
> David,
>
> see attached a picture of the B-5870 by JRC.
I would hope that your power supplies have regulated voltage, correct?
Therefore they should both be the same voltage, within the tolerance of the
voltage determining components, if the supply design has good load
regulation. In the worst case, provide a voltage trimmer on one supply so
that you
The most sensible low-cost direct drive arrangement in terms of parts count
and board layout is SOIC 74HC595 shift registers and SN75468 HV driver
arrays.
There's a Chinese Zirrfa 6 digit clock board that uses this approach.
On Mon, Aug 15, 2022, 7:09 AM David Pye wrote:
> Given the pr
assembly. Something like the gigadevices ST clone. Gd32e130 is about 2usd
at worst.
Can easily speak to them with 3v3 as well which is nice.
David
On Sun, 14 Aug 2022, 07:41 Richard Scales, wrote:
> I've used HV5522 and HV5622 a lot without any issue - I always use a
> CD40109B level s
John,
I'd love to see a photo of those tubes. I've been through thousands of 5870
tubes, but I've never seen a JRC tube.
On Mon, Aug 8, 2022, 9:09 AM John wrote:
> I have 5 NOS JRC branded B-5870 nixies for sale. I am asking $100
> postpaid in US. Price is a guess as I can't find reference
I haven't tried it, but I can make some observations. The MAX1771 isn't
connected directly to the output circuit, so it's not likely to suffer from
a problem. The current flows through the inductor which will accommodate a
momentary short circuit caused by the capacitor.
In short, it shouldn't be
That's the best price I've seen for those tubes in a lng time.
Oh, wait...
On Thu, Apr 28, 2022, 10:03 AM Michail Wilson wrote:
> I thought people would get a kick out of this auction. Especially those
> of us whom are always searching for MOD-6 Clocks or 6 tubes of B-7971
>
>
>
>
I findit amusing that a precision watch timing instrument has a 4 digit
display.
On Tue, Apr 12, 2022, 7:55 PM Nicholas Stock wrote:
> No idea what this is, but pretty interesting!
>
>
> Look at this on eBay
> RARE VINTAGE CLOCK, WATCH, JEWELERS TIMING, CALIBRATION MACHINE WITH NIXIE
> TUBES
>
I built a Nixie tube instrument cluster with speedometer etc. for my
Corvair last summer. I used many 74HC595 shift registers to send all the
tube cathode data out via SPI. Then I used TBD62083 octal high voltage
driver arrays to run the tubes.
I'll send you the design files if you're interested.
wrote:
> Hey David, I had a few minutes spare time tonight and I verified that both
> the hsync and vsync signals appear at exactly the right frequency (19.2kHz
> and 60Hz, respectively) and have the correct duration. Yet, the image is
> still garbage. How can that be, any ideas?
>
>
to see the
signal timing change to follow the settings. If you cannot do this, it will
never work correctly.
Good luck!
On Mon, Feb 21, 2022, 3:44 PM jb-electronics
wrote:
> David,
>
> Thanks for your pointers! In the Raspberry Pi's DPI configuration I set
> the amount of horizontal pix
Jens,
The horizontal line timing is incorrect. This is why the image is diagonal.
The numbers that you provided do not specify the horizontal line total time
or frequency.
The monitor requires 52 microseconds or 19.2 kHz.
You need to find a way to specify this, perhaps it is the character count
or
I expect that you would have to visit the archives in person and dig
through them yourself. I recommend calling the library and speaking with
their special collections person. They can tell you the procedure.
On Wed, Feb 2, 2022, 6:59 PM Audrey wrote:
> Hi David, I am ecstatic to h
Google has led me here more than once. It may be worth a visit to poke
through these records.
https://archives.lib.umn.edu/repositories/3/resources/222
On Wed, Feb 2, 2022, 12:51 PM Audrey wrote:
> Hey all, I'm in search of the original design documents for any Nixie
> tubes, ideally the small
Well, at least a 2D representation of a Nixie tube cathode in a decidedly
non-Nixie-tube housing.
Similar to that ridiculous Nixie watch in Metro:Last Light with end-view
tubes that's 14mm thick in total. And people want replicas of it made with
real Nixie tubes.
Ah, video game physics...
On
I don't know much about that tube, but the similar 5870 series uses the
letter suffix to describe the pins and spacer plastic.
On Wed, Jan 26, 2022, 6:19 AM 'Bogdan Paduraru' via neonixie-l <
neonixie-l@googlegroups.com> wrote:
> Dear friends ,
>
> Does any one of you knows the difference
I have one of their square watches. I also have experience repairing one of
them. It had a very poor quality lead trimming and soldering job on the
tubes.
The square watch has a seriously dim display. You can't see it well at all
in the daytime, even indoors. I suppose the huge power transformer
Bill,
I went a ways down that rabbit hole in 2006, ending up with a rubidium
Nixie clock. Then it subsided.
These days I can get all the time nut energy needed at my day job. We run
portions of the Event Horizon Telescope, which requires picosecond
correlation accuracy over several continents.
My latest scope clock uses a DS3232 RTC chip for general timekeeping. This
chip only keeps time to the nearest second, as far as the user-readable
registers are concerned.
I also have a USB port that can read the time from a GlobalSat GPS puck.
This reports the time once a second through the
Richard,
I have never, not once in my long life, seen a data sheet for, much less
spare units of, modules of this sort as used in calculators. They were
designed for a very specific purpose for OEM customers and not published.
You could get really lucky and find them, but don't expect to.
Your
> On Sat, Sep 4, 2021 at 7:11 PM Audrey wrote:
> Wow that's amazing! Excellent work.
>
> On Sat, Sep 4, 2021, 10:00 PM David Forbes wrote:
> Finally! I have found a way to make Scope Clocks again.
> I first made them in 2001, using a plastic case fabricated locally. I
> rede
em to find anybody
who does 2 digit designs. Thanks, David
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To
couldn't have ordered the components cheaper than the finished
eBay module...
David
On Wed, 1 Sep 2021, 14:57 Dekatron42, wrote:
> You can use airgaps in transformers in some cases but this design should
> be without one according to Ed.
>
> I am using ferrite pot cores in some other d
Rather than going to dodgy vendors, I have been able to find a similar part
from a different manufacturer that meets my specs and is in stock at
Digikey.
Is there anything in the BAT series?
On Sat, Jul 24, 2021, 11:55 AM Michail Wilson wrote:
> I have been trying to buy components for a
CAMAC and NIM are two entirely different animals.
NIM Crates are older, dating from soon after WWII. Their backplane just
provides power, though some custom and non-standard modules did transmit
signals between modules through the backplane.
CAMAC crates are more modern, and provide power
Max,
The LT1308B has a .01 uA typical, 1 uA maximum standby current when
shut down, according to the data sheet, shown on page 2 as Iq (the
third line with Vshdn = 0V).
I don't think you have a problem here.
On 6/6/21, Max DN wrote:
> Hello,
>
> I'm working on a solar powered nixie watch
My understanding is that Amazon isn't simply allowing unfettered mesh
internet.
It may allow things like tile autolocation or Alexa searches etc but it
isn't intended to allow web browsing/downloads etc.
On Mon, 31 May 2021, 17:44 Scott Miller, wrote:
> Just a question. I'm not familiar with
Personally, I'm cool with it.
There are all sorts of alarmist articles out and about, but if you look at
what it *actually does*, and how much bandwidth it can potentially share,
and what can use it, it's minimal.
David
On Sun, 30 May 2021 at 16:06, J Forbes wrote:
> I don't have any Ama
I haven't been following this thread closely, but I finally looked through
it this morning.
It looks like this is a copy of my SC200 design from 2008. At least the
components look the same in the pictures.
Please send me an email at david at cathodecorner dot com, and I can help
you sort it out
Richard,
A single push-pull HV driver chip will not be able to drive a multiplexed
display.
The reason is that it only connects each tube element to either 0V or 180V.
It is not capable of leaving an element disconnected.
On Thu, May 20, 2021, 8:45 PM Richard Scales
wrote:
> Sorry, I mean
Richard,
A million years ago, I designed a multiplexed Nixie clock using a 74141
cathode driver and two transistors per anode. It worked well.
Here's the user manual, with the schematic at the end.
http://www.cathodecorner.com/nc620akitman.pdf
The only caveat is that capacitance in the Nixie tube
My Nixie watches have a variable 5-30pF capacitor on the crystal so that I
can adjust the oscillator to exactly 32768 Hz. You could use a different
value depending on your crystal characteristics. I use an old Hewlett
Packard universal frequency counter, running in time period averaging mode,
I built a couple LED TV sets about ten years ago. I had to solve this
problem. I bought a sync separator chip for the first one, and a digitizer
chip for the other.
See the bottom of the page for schematics.
http://www.cathodecorner.com/satanvision/
On Sat, Apr 10, 2021, 6:04 AM jb-electronics
Bill,
That's not a good idea. It is likely to oscillate. See my other reply.
On Thu, Apr 1, 2021, 6:37 AM Bill van Dijk wrote:
> Ty the unused inputs to ground with a 10K resistor, float the unused
> outputs.
>
> Bill
>
--
You received this message because you are subscribed to the Google
The standard way is to connect it as a unity gain buffer. Connect the non
inverting input to Gnd and connect the inverting input to the output.
On Thu, Apr 1, 2021, 5:53 AM chuckrr wrote:
> What is standard procedure for tying off unused op-amp inputs?
>
> If for instance there is a circuit
I'm building a Nixie instrument cluster for my Corvair. It's designed to
fit in the space formerly occupied by the speedometer. There are six
displays, made with 4998 and 5870 tubes.
The drivers are 74HC595 shift registers and TBD62084 HV arrays. It's not
multiplexed.
A Teensy 3.2 in a box under
Surely you've effectively got 10 of those resistors in parallel so the tube
current is 10x rated
Poor old anode
David
On Wed, 31 Mar 2021, 23:02 Jon, wrote:
> You're putting AC across the tube? In addition to what Paul said, think
> about the scenario in the negative half-
And IN18s were widely available at £40-£45 per tube as little as 6 months
ago, now £60-80 per tube.
Which makes me very happy I won a sneaky 8x CD66/ZM1177 type tubes
(horizontal mesh, tube type not specified) for £69 this very evening.
On Fri, 26 Mar 2021, 21:29 Nicholas Stock, wrote:
> This
The shield has a function of handling a static discharge when the plug is
attached or the board is touched. A conductive ring around the edge of the
PCB connected to the shield will prevent blowing out the electronics when
that spark occurs.
A resistor from shield to signal ground is reasonable.
per segment, so that
might not be any good for your application depending on how many IO pins
you have spare ..
David
On Sat, 30 Jan 2021, 00:57 peter bunge, wrote:
> I need to drive a single IV12 vacuum fluorescent display from a BCD to 7
> segment chip.
> I could use level shif
Have you looked at a max6920 or 6921?
On Sat, 30 Jan 2021 at 00:57, peter bunge wrote:
> 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
Eye of beholder and all that, but here's someone's video - I think that's
really nice, the tens of seconds only - gives it a stopwatch look.
https://youtu.be/3XJZ0Nz_vks
On Tue, 26 Jan 2021, 21:41 Yohan Park, wrote:
> Oh dear, that's a busy display then... :D
>
> On Tuesday, January 26, 2021 at
A chap on the facebook forum restored one of these a short while ago.
Beautiful clock.
On Tue, Jan 26, 2021 at 9:28 AM Mike Harrison wrote:
> On Tue, 26 Jan 2021 01:11:13 -0800 (PST), you wrote:
>
> >Never seen this before.
> >Longines Nixie clock
> ><
>
Presumably also allows a small amount of current to leak to the light when
the switch is off.
Largely irrelevant to incandescents but might well be enough to make led
lamps glow slightly
David
On Sat, 16 Jan 2021, 15:31 Yohan Park, wrote:
> The live and neutral terminals that
Loads of people have reported this and afaik there hasn't been a way to
stop it.
Some start swirling after a while, some swirl from new
David
On Wed, 13 Jan 2021, 21:18 Nicholas Stock, wrote:
> Anyone had any issues with INS-1 neons showing moving ionization in the
> bulb (s
The cathodes of all paralled Nixies will be pulled to 0 volts. I was
assuming that you would use a separate anode resistor for each Nixie tube,
because otherwise it wouldn't work for the reason that you state.
On Sat, Jan 2, 2021, 8:20 AM Bill van Dijk wrote:
> David,
>
>
>
&g
1. There is no reason that you couldn't run nixies in parallel, other than
the maximum current rating of the driver chip.
2. Getting Nixies to light up in the dark can be tricky. My Nixie watches
sometimes take a second or so to start glowing in a dark room. A second
activation displays normally.
Anyone tried using a hotplate for SMD soldering? (clearly, single sided
only..)
I've seen reasonable reviews of a hotplate, with a chunk of aluminium or
similar as a heat spreader.
David
On Thu, 31 Dec 2020 at 08:35, Mark Moulding wrote:
> If you're far enough along that you've got more t
e_id=pkxnfxx14qqcaqxn176b4e23c873772c75311b2064=&_imgsrc_=ae01.alicdn.com%2Fkf%2FH9f00dee051ac41e6851be671527a54b9d.jpg_640x640Q90.jpg_.webp
On Wed, 30 Dec 2020, 18:20 David Pye, wrote:
> I might give it a go too.
>
> Looks like an stm32 so an opportunity to make some open source fw
>
> David
>
>
I might give it a go too.
Looks like an stm32 so an opportunity to make some open source fw
David
On Wed, 30 Dec 2020, 18:09 H. Carl Ott, wrote:
> I'm very tempted to order in one of these just to see how many of the
> plastic frame pieces arrive intact, and not shattered.
>
&g
It's the same clock from the original AliExpress link, turned on its side
David
On Wed, 30 Dec 2020, 16:43 dixter, wrote:
> What is the site to purchase the music spectrum mode clock...
>
> On Tuesday, December 29, 2020 at 4:25:10 PM UTC-6 w...@kitsunegari.net
> wrote:
>
>
Don't worry about it.
This is a CMOS 5V signal, I presume. It only has one load, at the far end
of the trace. You do not say what the frequency is, so I will guess that
it's on the order of 5-20 MHz.
The signal integrity is important, to prevent ringing that would
double-trigger the load circuit.
The Monsanto MAN-1 was just about the first. It was a calculator sized
single digit in a 10 pin flatpack with staggered pins.
HP made their display with a controller chip in it soon after.
I have a huge three ring binder full of display brochures from 1969 that I
found at Black Hole surplus about
The voltage feedback resistor is a low impedance node on every voltage
regulator design that I have worked with. Typically 1k ohm. I don't see how
that could happen.
On Wed, Dec 9, 2020, 12:30 PM newxito wrote:
> I just wanted to share something that happened to me yesterday. I killed
> the
Could you insert two-core screened cable for the HV and HV gnd in a daisy
chain setup, and reduce the amount of noise finding its' way into the I2C
bus?
David
On Fri, 4 Dec 2020 at 23:36, newxito wrote:
> I couldn't find a cat6 cable that was thin and flexible enough for this
> project
You can multiplex and make 1 do several tubes of course...
David
On Sat, 31 Oct 2020, 15:23 Yohan Park, wrote:
> Okay thanks
> I wouldn't call them small though. They're 16 pin ICs and you need one for
> every tube.
> Perhaps not a big deal for a larger clock but when designi
I.C. means Internal Connection. It's usually connected to part of the tube
structure. Leave it unconnected.
On Wed, Oct 28, 2020, 5:23 PM 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
That's really cool! I have wanted to make a Nixie tube version of an HP-11
for years, but got stuck on the keyboard.
I have a box of +- tubes if you're interested.
On Mon, Oct 26, 2020, 3:59 PM newxito wrote:
> The B-5870 calculator is now finished. In this version I made some minor
> changes
I built a bunch of multiplexed clocks in 2001-4 using the 74141 chip, which
the Russian chip is a copy of. I used various Burroughs and Philips tubes.
I found that the multiplexing worked well on a PC board, with 100
microseconds to a millisecond of dead time before changing the binary value
at
Max,
Hi. I wrote all that code.
The NWR watch that I designed uses all the capabilities of the
PIC16LF722 chip. It was carefully engineered to do exactly what it
needs to do and nothing more. Every pin does useful work, some of them
doing two or three jobs at once. It has absolutely zero room
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