ift register vs multiplexing using high voltage
> transistors on anodes and cathodes of the nixies? Other than saving
> component and uC pins, of course.
>
> Original message ----
> From: Bill Stanley
> Date: 13/08/2022 17:32 (GMT+00:00)
> To: neonixie-l
I use that part for my NIXIE, Panaplex and LED displays and I also write in
assembly (8051, not PIC)
For my code, I send the serial data for NEXT time to display in the time
after a 1 second update. On the 1 second "hack"
I update the display by doing the serial to parallel pulse.
Here is the
My NIXIE clocks have an on-board GPS receiver and I set the DS3232 to
generate a 1 PPS output. On power-up I sanity check the internal registers
and if it looks good I
transfer the date and time to the uP memory. I pre-increment the internal
time and at the PPS IRQ I update the display RAM from
I would agree that dis-encapsulating would be a long shot. Many years ago I
worked with a company (MuRata?) to create a PLL module for a HDD
controller.
The module was a SIP, like yours designed on a thin ceramic substrate.
Resistors were screen printed on the ceramic while caps, ICs
Greg,
Would you mind listing the current limiting parts you use for both the PMOS
high side and the NPN low side drivers?
Thanks;
-Bill-
On Tuesday, May 25, 2021 at 3:54:18 PM UTC-7 gregebert wrote:
> I'm attempting my first multiplexed nixie project, in this case a
> 13-character /
OK, that was quick. Opened the box, all parts appeared to be in good shape,
but no documentation of any kind. If I could prevail on the other builders
for a copy of the instructions/schematics, it would speed up my build.
Thanks;
-Bill-
On Friday, May 21, 2021 at 6:23:56 PM UTC-7 Bill
Toss another kit on the barbie
My kit arrived today so I will be building it over the weekend. Watching
the comments closely.
-Bill-
On Friday, May 21, 2021 at 5:14:24 PM UTC-7 gregebert wrote:
> I have an Aneng UT61e; cheap but quite good. One of my scopes has a pair
> of 100x probes
It may depend on the Heathkit clock you have. I have the original GC-1005
that uses the SP-352 tubes just fine. I do note that the 353 displays have
more pins than sockets (pin bent out of the way) so perhaps the 352 is a
superset of the 252. In the manual on page 20 it indicates that your
Hello All,
I am currently building a Mostek MK5017 simulator based on an 8051 class
microprocessor. It is based on 2 stacked PCB’s with the upper board running
at 3.3V and a voltage translator/pin matching board that has the 24 pin DIP
pinout to match the MK5017 pinout and voltages (15V,
Not a lot of help but from the USB spec:
6.8 USB Grounding
The shield must be terminated to the connector plug for completed
assemblies. The shield and chassis are
bonded together. The user selected grounding scheme for USB devices, and
cables must be consistent with
accepted industry practices
series LEDs with an If of 25mA and a Vf of 10-12V, thus no resistors
required.
-Bill-
On Saturday, January 2, 2021 at 8:26:58 AM UTC-8 Bill Stanley wrote:
> From a software point of view the Arduino should be able to generate the
> signals. It is possible that a SPI interface will do
21 at 7:40:33 AM UTC-8 Jeffry P wrote:
> Will an Arduino work? Is there alibrary that will produce these signals?
>
> On Thursday, December 31, 2020 at 4:19:22 PM UTC-6 Bill Stanley wrote:
>
>> Correct, these are a differential receiver to receive the serial (BCD)
>> inform
Correct, these are a differential receiver to receive the serial (BCD)
information, 2x8 shift registers to convert to parallel BCD and 4 BCD to
seven segment LED drivers.
With a bit of sleuthing, the schematic can be reverse engineered, reverse
engineer the serial format and build or use a
ed if it had
> failed.
> I've also checked that all the various switch contacts are good and they
> do seem to be.
> I don't think that replacement clock ICs are going to be that easy to
> locate!
> Richard
>
>
> On Tue, 10 Nov 2020, 16:08 Bill Stanley, wrote:
>
&
A possible cause of the failure to count is the 60Hz signal the clock uses
for a time base. Look at pin 23 of the MK5017 with a scope for a half wave
60 (or 50) Hz signal.
-Bill-
On Tuesday, November 10, 2020 at 7:10:26 AM UTC-8 Richard Scales wrote:
> Thank you. I have a Heathkit clock
+ postage and get back to you
Thanks Phil
-- Original Message --
From: Bill Stanley
Date: September 7, 2020 at 9:37 PM
If still available, I would be interested in 12.
Thanks;
-Bill-
From: alb.001 alb.001
Sent: Sunday, September 06, 2020 11:20 AM
If still available, I would be interested in 12.
Thanks;
-Bill-
From: alb.001 alb.001
Sent: Sunday, September 06, 2020 11:20 AM
To: neonixie-l
Subject: Re: [neonixie-l] Re: Source for Panaplex displays
I have a fair number of brand new in factory trays of Beckman SP-353 3 digit
1/2
Looking at the schematic, the car 6V power (assumed negative ground) feeds
the center tap of the step-up transformer. The 2 "outer" windings are
connected to the 2 poles of the vibrator. First guess is that the vibrator
alternately grounds the 2 sides of the primary with a square-wave alternate
n 3 months. Every time I think my IN-14
> clock has troubles with AC pulses, but in fact it's the grid running
> noticeably fast or slow.
>
> Paolo
>
> On Wed, Jun 19, 2019 at 1:43 AM Bill Stanley > wrote:
>
>>
>>
>> I promised to post some details on my
o programming skills so hoping something
> will present itself.
>
>
>
> On Tuesday, June 18, 2019 at 4:52:45 PM UTC-4, Bill Stanley wrote:
>>
>> Hi Greg;
>>
>> I have a ongoing clock design where I separate the CPU from the display.
>> The main CPU board u
I promised to post some details on my current Nixie nightmare. I present:
The BRS Clock
The current version of the clock is in 2 (or more) PCBs. This was done to
allow changes to the display type by only either changing the display board
or the display cluster boards. The board can be
Hi Greg;
I have a ongoing clock design where I separate the CPU from the display.
The main CPU board uses a SiLabs 8051 class CPU with LOTS of features (some
might be considered a bit crazy).
The CPU generates all voltages (the 170 is adjustable under firmware for
higher-voltage tubes. The
Hello everybody….My name is Bill and I am a recovering horologist…..
Who do I think I’m fooling?? I’s sitting here with a prototype Nixie clock
on the desk and I am writing and testing code right now.
My story goes back 49 years to the summer of 1970. A brilliant (his words)
college
On Wednesday, September 19, 2018 at 8:03:23 AM UTC-7, neonixie-l wrote:
>
> Ladies & Gentlemen,,,
>
> We are getting a steady stream of new members - it'd be great if, instead
> of just lurking, you could introduce yourselves with a bit of detail about
> your interests, what you've built or
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