In my past life at an operating nuclear power plant when we brought
the unit back on the grid we still used the synchroscope method...no
flashing bulbs just a nice analog meter that indicated the generator
was in phase. Then manually closing the main breakers and hopefully
everything worked well.
That would look cool in the dash of my Humvee :)
On 17 Jan, 20:55, Dennis daddyvan2...@yahoo.com wrote:
I use one as a test bed for programming. Direct drive just hook it up. Now if
I could just figure out how to program. :)
From: mike logan...@gmail.com
OK...don't laugh but I use spray can carburetor cleaner...Gumout works
best... The stuff is highly toxic so make sure you have proper
wentilation. Also be careful of some plastics...but I havent had any
problems except from cheap Chinese PCB's where the solder mask got
slightly sticky but after
A manometer works great but to read that high of a vacuum but you will
need a mercury filled instrument...perhaps it is hard to find these
days...when I worked in an instrument lab a guy blew all the mercury
out of one...what a mess!hazmat crew had to fix it. There are
nice digital vacuum
to be available - why not build a
retro LED clock, to the reference design?
But for Nixie/VFD's? Hmm. Unless you have a passion for this chip, I
wouldn't start from here
I guess you have this -http://www.datasheetarchive.com/MK50250N-datasheet.html
Laurence
On Oct 22, 2:23 am, neutron spin mrstan
Thanks for the information...I have just run across a numitron clock
that used a MM5314 and may try to use the Mostek chip with a similar
numitron design. They sprinkled many diodes on the segments to
prevent ghosting. I said it before... this place is fantastic with
the knowledge base from the
Hello,
Has anyone had any luck using the MK50250N chip? What about the
driver circuitry used ?...Thanks..
Robert W8UUU
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I really appreciate the information. Another question...If I want to
design a clock using a 7 segment VFD tube can a clock design using
standard 7 segment LED's be adapted to drive the VFD tubes. I know
the voltages for the plate, filament and grid drive circuitry are
different but I am talking
Hello ...
I have been collecting VFD tubes and I figured it is about time to put
them to good use. Mostly Russian IV series. Can anyone recommend a
clock project or information to get me started. They seem to be like
regular triode tubes but driving them seems sort of mystical to
me...any info
Is that laser cutter similar to the ones that are selling on E-
bay?Hard to believe the price. How does it work with 1/8 inch
acrylic cutting?thanks...
Robert W8UUU
On Aug 8, 11:12 am, John Rehwinkel jreh...@mac.com wrote:
If you want laser cut from them, you pay.. I think it is $150
Hello All,
Looking for some ideas or plans for a neon ring counter nixie clock.
I have some IN-12's that are very anxious to be born again in a neon
ring counter clockthanks...
Robert W8UUU
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of these and
they're great clocks
Nick
On Mon, Aug 8, 2011 at 3:17 PM, neutron spin mrstan...@charter.net wrote:
Hello All,
Looking for some ideas or plans for a neon ring counter nixie clock.
I have some IN-12's that are very anxious to be born again in a neon
ring counter clock
2011 19:47:45 neutron spin wrote:
Thanks for the info...They really look nice but I was thinking of a
design just using neons as ring counters with no microcontroller...old
school...regards
Robert W8UUU
On Aug 8, 6:26 pm, Nicholas Stock nickst...@gmail.com wrote:
Have you checked
I have a minor comment on the circuit designIf you are going to
use a battery the 7805 will waste power. How can this be avoided? One
fix would be to use a Low-dropout regulator...using the walwart of
course you are not concerned with battery life.
Rergards
Robert
On 20 July, 11:47, Shane
A suitable device could be the L4940V5 from ST .if you need less
current there are many others
Regards
Robert
On 20 July, 13:36, neutron spin mrstan...@charter.net wrote:
I have a minor comment on the circuit designIf you are going to
use a battery the 7805 will waste power. How
Hello All in Nixieland,
Mr. Forbes may have some insight on this question. I am experimenting
with some old electrostatic CRT's and need advice in designing a
suitable power supply. I would like to use a SMPS design...(I hate
big ugly transformers)...using some type of flyback circuit. This
On 7/20/2011 12:42 PM, neutron spin wrote:
Hello All in Nixieland,
Mr. Forbes may have some insight on this question. I am experimenting
with some old electrostatic CRT's and need advice in designing a
suitable power supply. I would like to use a SMPS design...(I hate
big ugly
on his web page here
http://www.cathodecorner.com/sc100.html
There is a link to the (hand drawn) schematic near the bottom of the
page
Jim Forbes
neutron spin wrote:
Hello All in Nixieland,
Mr. Forbes may have some insight on this question.
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You received this message because you
Thanks for the infoThis will indeed be a great learning
experience!.Now I must get to work breadboarding a P/S
first...ordering parts...etc.
Regards
Robert W8UUU
On Jul 20, 5:13 pm, threeneurons threeneur...@yahoo.com wrote:
A little note to remember about using electrostatically
with 16Mhz crystal to keep time
and use a supercapacitor for backup power. It keeps surprisingly good
time. You're free to try the design - I'll let you know when I get the
schematics up - but a clock with buttons would certainly be easier :)
Sean
On Fri, Jul 15, 2011 at 9:24 AM, neutron spin
The first scope I got my hands on was a WWII military scope...the CRT
was around one inch and there was a rubber hood that you would put up
to your head to see the trace. The bandwidth was pitiful but not
necessary back thentelevision was just coming out. There are many
good books on
I have never seen a charlieplexed nixie clock until I saw your two
tube design. The only application that comes to mind is the Bulbdial
Clock designed by the Evil Mad Scientist...used for LED's...
Regards
Robert W8UUU
On 17 July, 15:25, Quixotic Nixotic nixot...@blueyonder.co.uk wrote:
On
in my brain that may start growing soon..My idea of
an encapsulated brick clock is starting to take formthanks...
Regards
Robert
On 15 July, 00:27, David Forbes dfor...@dakotacom.net wrote:
On 7/14/11 9:05 PM, neutron spin wrote:
Yes for the IN-17 design AVR would be my choice
OK...newbie has another question for all the nixie folks out there...
I have see the LT1308B High Current, Micropower Single Cell, 600kHz DC/
DC Converter made by Linear Tech. used in some power supply designs.
My question is where the heck do you find a source for a step-up
transformer for the
I have found some CCFL transformers that may work but they do not list
the turns ratio. All the specs just list the secondary voltage
ratings and power ratings. If these would work how do you determine
the proper one to use?thanks...
Robert
On 16 July, 11:52, neutron spin mrstan
PM sent
On 16 July, 12:54, David Forbes dfor...@dakotacom.net wrote:
On 7/16/11 8:52 AM, neutron spin wrote:
OK...newbie has another question for all the nixie folks out there...
I have see the LT1308B High Current, Micropower Single Cell, 600kHz DC/
DC Converter made by Linear Tech
Good logic...I suppose it is like the difference between a Mercedes
and a Chevy...they both will get you there but.
On 16 July, 22:06, threeneurons threeneur...@yahoo.com wrote:
| OK...newbie has another question ...
|
| I have see the LT1308B High Current, ...
| DC Converter ... used in
If you were designing a 4 tube IN-17 clock on a very small footprint
would the LT1308B be the way to go? Having the ability to run at the
lower voltage may be a plus. I checked out Mr. Taylor's power
supplies and they are nice but I wanted to use components on a new
board design from scratch.,
That clock has to be one of the coolest I've seen!One
question...do you need to shake it that hard to change modes?A
tilt switch like in my Android is very easy to activate but you
probably need more axis or modes so ...(X/Y/Z) so accelerometer was
needed. I do have an Arduino that is
Let me know if you still want to sell the IV-17's and
price...thanks...
Robert
On 15 July, 15:34, Shane Ellis mime...@gmail.com wrote:
I think I'll stick to the nixies, and neon bulbs for now. I bought some
IV-17s without any forethought, and those are a whole other animal. If
anyone wants
Excellent write-upreally takes the mystery out of ittri state
outputs...seems like there were discrete IC's that had similar
outputs...Yes I remember tables...The Smith Charts sticks in my
headstill have my old slide rule!thanks for the info.. you are
a treasure trove of
As a hobbyist, would the Cortex chip be a good platform for learning. I
know everyone hypes the Arduino environment for beginners but I would prefer
to go with something different. I assume this MCU would not be overkill for
a nixie clock design? I know these are used in devices as the
Thanks Adam,
It seems that Stanislav Pechal's code is used by others as a starting point
for some of these clock designs. I appreciate the information and can learn
the basics. The code is pretty compact and has the basic features. The
display multiplexing was something I wanted to get a
I have seen all transistor logic designshorror of horrors!...but
it is a retro way of doing this. Perhaps using wire spring relays or
step by step switches would really be interestingbut it would need
a couple of racks to build...not really practical. I envision smaller
compact
Yes for the IN-17 design AVR would be my choice. I believe the AVR
Tiny series are made in surface mount packages. Sandwich construction
(Tube board stacked) and controller using mostly surface mount parts.
This would accomplish two of my objectives.to make a small
footprint nixie clock and
I just checked out the LCPXpresso development board and it looks quite
interesting as suggested by a member. The IDE is free and it is Linux
compatable and has an onboard debugger for around $30. My question is this:
Is it possible to use C code written for AVR or Microchip microcontrollers
Hello All,
I find this group to be one of the most interesting hobby
groups!With the compliment out of the way, I have a question on
the various microcontroller firmware out there. I am looking for some
free (OK... I said it!) firmware to use in a new nixie clock project.
Atmel or Microchip
...@dakotacom.net wrote:
On 7/10/11 10:59 AM, neutron spin wrote:
I understand that the folks that sell clocks or kits out there have to
protect their code. But I was looking for something open source or
whatever that I could experiment with to get me started. I have
collected several
First you must create a market through advertising your product
Second..determine the potential sales from an in-depth marketing study
Third...calculate the total gross sales in dollars (if possible)
Fourth...go to Goldmanm Sachs or a venture capital firm and present
your case along with capital
Probably the best method would be to build a WWVB or GPS 60Hz
synchronized clock and designate that one a master and feed the others
with that signal. Another possibility would be to build a small 60 Hz
alternator with a WWVB or GPS synchronized phase locked loop to
control it's frequency and
From what I have heard that electrolytic capacitor chemical
ingredients are treated like the Holy Grail by the capacitor
manufacturers. The formulations are protected since this can make or
break a manufacturer. The voltage and capacitance of course is
determined by the chemical composition of
I just knew you would do something like that! Now I will make a small
temperature controlled oven for the crystal and we be happy!.You
make the best nixie power supplies BTW...regards...
On 29 June, 16:51, taylorjpt j...@tayloredge.com wrote:
I did this for fun a while back. It uses
In fact this is the controller I may use:
http://www.w6pql.com/crystal_oven_controller.htm
On 29 June, 19:53, neutron spin mrstan...@charter.net wrote:
I just knew you would do something like that! Now I will make a small
temperature controlled oven for the crystal and we be happy!.You
I have always wondered what do you do when there is a power
outage?Also do the utilities account for any outages or does that
even matter? Yes, Yes I know you just reset the master line clock
after the outage and all is well...regards...
On 29 June, 20:00, James jamesrsw...@gmail.com wrote:
Great idea...sometimes the simple designs are the most
effectivethe only drawback of course for any of these crystals is
the temperature effect on the crystal and drift. We are not dealing
with NBS traceable standards here but if you a real sticklerI have
some Cesiumjust kidding...the
for temperature driftwow...are we splitting hairs
or seconds?...lol...regards...
On 28 June, 12:24, H. Carl Ott hcarl...@gmail.com wrote:
On Tue, Jun 28, 2011 at 11:37 AM, neutron spin mrstan...@charter.net wrote:
Great idea...sometimes the simple designs are the most
effectivethe only drawback
to have to add a 60Hz generator to it.
Thanks for the link.
On Jun 26, 11:05 am, neutron spin mrstan...@charter.net wrote:
It's a conspiracy between Elm electronics the FERC.
http://www.elmelectronics.com/ebench.html#Oscillators- Hide quoted text -
- Show quoted text -
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Personally I am going to use my old standby. the Heliochronometer
On 27 June, 16:03, J Forbes jforbnos...@selectric.org wrote:
I wonder how I'm gonna get that neat flapper mechanical clock to keep
time after the experiment starts? Or my scope clock? or my TTL nixie
clock? or my old Cathode
Also many of the cheaply designed nixie clocks just use a cheap 4 Mhz
or whatever the design uses and these are usually rated at 10 to 20
PPM. Color burst crystals can be found with similar tolerancesso
what's the difference unless you are using temperature compensated
oscillators..I
It's a conspiracy between Elm electronics the FERC.
http://www.elmelectronics.com/ebench.html#Oscillators
On 26 June, 11:35, J Forbes jforbnos...@selectric.org wrote:
We have about eight clocks here that we use to tell time at home
regularlythey ALL are based on line frequency!
Maybe we
I think the original idea of grid frequency maintenance is when clocks were
purely mechanical before the digital era. They of course were just
synchronous A.C. motors that were terribly inaccurate without the
synchonization to the power grid's frequency. This also was before GPS and
Yes ...that was a clever and (cheap) method of creating a relatively
accurate time base but with modern technology there really is no reason to
keep this method. Of course existing designs that use the grid's
frequency are going to have to live with it. Similar to going from analog
TV
$19..?must be a typo...lol...
On 26 Apr, 10:45, watacchi watacc...@yahoo.co.jp wrote:
Hi everyone.
I have sooo huge stock of CD81 nixie tubes.
Does anyone wants them?
I can surely say that these are so rare and
this may be last chance to get new ones.
These was kept in a big warehouse
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