Hi,
It’s not difficult. My fumbling attempts at a Nixie clock some time ago
used a 4:1 multiplex ratio, using four digits and only one decoder. I used
the same MPSA42/MPSA92 driver as your example. My multiplex function was
called at 100Hz, so each digit was refreshing at 25Hz. It doesn’t
hat.
>> Back in my day I mostly used 4000 CMOS, I didn't do much with TTL.
>>
>> On Wednesday, 27 September 2023 at 11:23:17 UTC+1 Nick Sargeant wrote:
>>
>>> I'd agree with the above. To make sure you are avoiding any
>>> indeterminate states, pull al
I'd agree with the above. To make sure you are avoiding any indeterminate
states, pull all of the inputs up to +5v with a resistor of about 2k2 to
4k7. Then, for the inputs you want low, jumper those inputs to ground. The
pull-up resistors will mean you get a good solid '1' without the jumper,
I have an HP54502A which has been my daily driver for years. Unfortunately
that ceased to function one day, and I had to go and find another scope to
fix it. (gnarly power supply issue) Now, I happened to have an HP16500A
around the place, and by luck I found a 1GHz scope card for it, so after
Comparing the timings in the picture and going for common denominators, you
can see that the front porch and back porch are (4 units of 660 ns) long,
hsync is (7 units of 660ns) long, video itself is (64 units of 660ns) long.
So I would offer that there is a 64 character display, where each
led it :-(
>>>
>>> On a more positive note - hello near neighbour - I live just west of
>>> Chichester!
>>>
>>> - Richard
>>>
>>>
>>> On Tuesday, 20 October 2020 16:01:09 UTC+1, Nick Sargeant wrote:
>>>>
>>>
Having not really discovered a use for them - I think I have two in a
collection of vintage stuff that came to me from a death in the family of a
friend of a nephew. Will ship to anyone interested in refunding the postage
- would like to see them go to a good home, as it were.
I live in
You seem to have already taken care of the normal recommendations. So,
first make sure the metal tube is grounded at the base. Second, make sure
that it doesn't connect to the ground at the far end of the tube near the
nixies - that way, you will avoid signal currents using the tube itself as
When I first started making my own PCBs, I used to get SRBP boards from a
small shop where they sold off-cuts, scored them with a knife and peeled
off the unwanted copper. If you lifted up a corner with a knife, it worked.
My boards had copper in big rectangular patterns, with holes wherever
VFDs are used in consumer electronics as well - my Denon home cinema amp is
a VFD. I'm sure over time OLED will replace them, and of course I only have
older models in my home that arrived here as (faulty, repair, spares) from
some auction site or other, so I can't be sure it is current
I, like others wanted access to the Arduino libraries, so I tend to use an
AVR 328P with a 16MHz crystal, a resistor, two capacitors and a six pin
header that I can plug a USB-serial adapter in to. That makes it easy to
program, without wasting hardware on the board itself. I buy a kit of the
http://www.tube-tester.com/sites/nixie/data/1970-0038NL-989/NL-989.htm
Nick Sargeant
niksgar...@gmail.com
On 4 Oct 2017, at 16:28, Christian Bjelle <cbje...@gmail.com> wrote:
ZM1024?
> 4 okt. 2017 kl. 17:26 skrev jb-electronics <webmas...@jb-electronics.de
> <m
Oh, I could tell you some stories. When we did some early ships of advanced
workstations to universities, I had a bunch of complaints from Cambridge
University that their optical mice were failing randomly. I phoned the lab
tec to find out what was going on .. these mice used two colours of
I tend to use laptop power supplies to interface with my projects - I am
always picking up power supplies as laptops get replaced at work. They
usually kick out 19.5v at 4 or 5 amps. I then design in a small switcher to
bring that down to 5v for the using application, and put that on the board
I was in Lithuania in the early 90s, shortly after the exit of the
Russians. There were factories there still making ICs and stockpiling them,
even though the products they were targeted for were history. As I recall,
they were making DEC VAX clones, and that is what the ICs were aiming for.
Have you tried searching Noritake rather than Itron? DIgikey has a
reference to the part number with Noritake as the manufacturer.
On Monday, 4 January 2016 17:24:08 UTC, Joe Hutch wrote:
>
> Hi everyone,
>
> A friend referred me to this group, suggesting that someone here might be
> able to
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