when its your patent. I did just
what you are suggesting through the attorney of record and got good
results. What you want to threaten is Future invalidation.
jt
On Feb 1, 1:44 am, taylorjpt j...@tayloredge.com wrote:
You can access the full system without any account via PAIR if you
know
Check out this page:
http://www.tayloredge.com/reference/Circuits/GPC41-5G/index.html
This is an easy way to go directly off line so you don't have the
double conversion hit (Assuming you are not running this off
batteries!) of AC to LVDC to HVDC. This applies to any power supply
that puts out
The diodes are a good idea but be sure to use low leakage parts such
as the BAS70: 4nA per diode at 5V Vr. The 7441 drivers already have
pull-ups intrinsic to their design. Without the diodes, the pull-ups
would feed current from all logic-1s of the counters to the VDD and
then the ground of
Here is the modification for 50Hz:
http://www.tayloredge.com/storefront/1384_TIClock/1384_60-to-50Hz_Conversion.pdf
Note that there are some errors in the original schematic, cleaned up
schematic here: http://www.tayloredge.com/storefront/1384_TIClock/1384.pdf
jt
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Page 17 shows the voltages on cathode 6 of an IN12 vs all the other
cathodes being driven:
http://www.tayloredge.com/storefront/SmartNixie/DataSheets/Datasheet_SmartNixie.pdf
The other cathodes capacitively couple to each other but the driven
cathode gets nearly all of the current. You will
Are you running the HVPS from the 9V or the 5V? You should definitely
not use the 5V for the HVPS as it can run from up to 16V and at a
current inversely proportional to the input voltage.
jt
It is a while since I built a Nixie clock. Just finished one using
Moses chip, Tayloredge hv psu,
Here are my libraries... http://ppl.ug/T3RHYshU8Hg/
jt
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In case you are wondering why this is so, it's because TTL logic is
based on NPN transistors. They are good at pulling a signal down to 0V,
but not good at pulling a signal up to 5V. So a resistor does the
pulling up, and the transistor does the pulling down.
You can see this in the
[image:
http://www.tayloredge.com/reference/Electronics/Displays/Itron_FG326A-2.jpg]
I have an attic full (About 2K) of these Itron
FG326A-2http://www.tayloredge.com/reference/Electronics/Displays/Itron_FG326A-2.jpg.
They are 32 character/14 segments with DP. Let me know if you want some.
The 1363 and 1364 have been in production for about 5 years and are the
same circuit in two different form factors.
There is a variant of the 1363, the 1363 RevB, that includes the app note
9003 http://ppl.ug/2sYmV9PWF1w/ modification for PFM mode supression (AKA
Noise) and are tested
.whew,john taylor has got me out of the woods on this one,I had the
pinout backwards,its rather confusing but problem solved(although I did
render one unit garbage)I guess $13 isn't to bad a price to pay for
learning the hard way
Tony: No problem, and remember to send the cooked unit
I have gotten quite a few requests for a voltage tripler circuit for the
1363/1364 HVPS, so here it is: http://ppl.ug/IEd55TCltCo/
When properly preloaded, the line and load regulation at 600V/2W out is
better than 5%: Vin 5-16V/I out 300uA to 3mA.
jt
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Just finished my 50W HVPS design, should be able to push it to 75W at 36V in.
150-200V out.
5-36VDC in.
200V/0.250A at 24V in.
Same form factor as 1364.
This was designed to power my nixie Sudoku project: 91 direct drive IN12Bs
(2.5mA/tube) with an IR grid input system.
Proto/Test Bench: http://ppl.ug/SJYXP4kw6u4/
50W test data: http://ppl.ug/dwkhS2L32kI/
85% efficiency from 20mA to 260mA at 204V out and 24VDC input. It has the
same adjustment scheme as the 1364 as well as enable logic. Very quiet and
very low EMI since the transformer is a closed
77W test data: http://ppl.ug/A2EYKy2BwmY/
383mA/201Vout at 36V input (48V abs max); Had to pre-load my load bank to
get over the 250mA limit.
jt
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I use a mux in front of an HP34401 multimeter that auto ranges and so can read
from 0.1uV to 1kV. It was just easier to display 6 decimals on the quickie UI
I wrote tonight.
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Regarding isolation, some circuits are easier to build if the different
high voltages needed are isolated from the low voltages (digital and/or
analogue) and in the case with Russian Dekatrons like A-201 (Polyatron) it
is a lot easier to design a circuit with isolated power supplies than those
If you have 600V out of a 160T winding, to get 450V you would simply put a tap
at 120T. Completely isolated outputs work the same but instead of a tap, you
just have a separate winding for each output. This also points the way to get
a low impedance feedback network (Less noise pickup) with a
For custom voltage supplies that you can do as roll-your-own projects, I have
selected a ferrite UU core set that is good to 50W when gapped properly and
allows for easy winding off the core (It was doing 92% eff at 30W due to the
lower core losses of the ferrite). I am working on a
I have been known to use the decoy chore, something she can see that makes her
think that the rest of the list must be on the plate... you do not fix
something hidden by drywall as the decoy chore, no matter how mission critical
it is!!!
I have been using this coil winder one for decades, with
Load bank controller: http://ppl.ug/IN9_UfuijAg/
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Ran the first 1474 at 306V out @ 93W (75W design limit) for over a week with
convection cooling with the transformer separated from the driver by an inch to
limit the power density, should be great with the mounted transformer and
potting.
First cut of the1364 refresh: 10-25V in (48V abs max),
I have digitally controlled loads specifically to test transient response and
phase margin. The relay controlled resistive step loads are simply for
generating efficiency curves and measuring thermal performance.
Since the meters integrate everything, you can't use them to measure damping so
Loadbank controller all programmed, ready to integrate into box:
http://ppl.ug/BGzyuOb0FxE/
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Ron: j...@tayloredge.com
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Ron: j...@tayloredge.com
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With a processor the best way to adjust the output voltage is via a PWM (Or
a DAC if you want to get fancy).
Since a voltage into the adjustment resistor results in a linear change in
current (The other side of the resistor is maintained at a constant 1.24V)
in the feedback network, the output
You can also build your own DAC with an R2R network controlled by GPIOs
that will give you a linear Radj = Vout voltage vs binary code. You can
buy R2R ladders off the shelf:
http://www.digikey.com/product-detail/en/4610X-R2R-103LF/4610X-R2R-103LF-ND/3787967
jt
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): A 1K R2R network and 6 GPIOs gives you 3volts/step
from 5V to 199V.
On Tuesday, September 9, 2014 11:43:50 AM UTC-7, taylorjpt wrote:
You can also build your own DAC with an R2R network controlled by GPIOs
that will give you a linear Radj = Vout voltage vs binary code. You can
buy R2R
The two parts look nearly identical from the datasheets. Since it was
common to simply add an application diagram to an existing datasheet
instead of creating a new part number, the LM9022 was probably a way to use
LM4871s that failed some of the audio amplifier specs that would be
critical
//I'm tempted to get one of each and have a friend decap and examine them.
// -John
That's actually not a bad idea. When the LM4871s come in I'll do just
that.
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Pulled the die from one of my ca 2001 LM9022s and it was indeed an LM4871
(Picture later). This makes me think that the LM9022 is a way to absorb
fallout from the LM4871 line, and if they don't have enough fallout they
could just use good LM4871s instead.
jt
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Images of LM9022 die...
http://ppl.ug/PCAptU3GN6g/
http://ppl.ug/5DTx4xMnVT4/
http://ppl.ug/dDfWdwPaa4I/
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These are the exact same parts (Mechanically, perhaps not performance
wise), right down to the mask set which has not changed since 2001: Every
layer in the set has the same revision between these two parts.
New LM4871 from Digikey:
http://ppl.ug/i4CUcbOKElY/
From the LM4871 data sheet:
Aluminum and Lead and Tin all have different electrode potentials and will
corrode when in direct contact. When not in direct contact, the slightest
condensation of atmospheric water forms an electrolyte which then attracts
and holds more water due to the increased surface area and surface
If you send me your shipping address, I'll send you one of the 7805 drop
in's that I built. I used it on my TI App note clock and it was so
efficient (95%) that I even hooked the HVPS to the 5V rail.
It is the same foot print as the 7805 and uses a 4-40 socket head cap screw
for mounting. It
You are probably saturating the inductor since you don't have a current
sens resistor in the source connection of the output transistor.
jt
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Here's a PDF from 2004 on probe connections:
http://www.tayloredge.com/reference/Electronics/TestBench/ScopeGrounding.pdf
Especially when testing power supplies the ground wire acts as a single
turn magnetic pickup.
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Per the data sheet
(http://www.tayloredge.com/storefront/SmartNixie/DataSheets/Datasheet_SmartNixie.pdf),
all of the switches need to be set to the ON position = for the
device to boot as slave zero = 0x10. All switches set to the off position
boots the unit as the master in a 4 or 6
They have been replaced by the newer tech TRG1509. The transformer is smaller
as it runs at a higher frequency but the new windings still fit due to the
adjusted turns ratio:
Model9V170V
TR1509 15T 250T
TRG1509 11T 184T
The TRG1509 adds a faraday shield to the outside of the
My question was primarilly to see if there was any interest in a comercial
version of this... however I will be making up quite a few as proof of concept
that will be given away after testing is complete.
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I'm using two STTH1R06A in series. The switchers usually operate between 50 an
100kHz so you want to keep the reverse recovery time below 50nS. 25nS or
better at the low currents used is pretty easy to find. Just as important is
the reverse voltage rating as these need to support the
These switchers can deliver the full output power from any combination of
output loads so long as the feedback circuits are correct. The primary side
controller would not know the difference since it stores the same energy in the
transformer during the on time regardless of how it is output
That's what I like about the Cincon TR(G)1509: The chose to not split the
primary. The currently avaliable G version still did not split the primary and
only added a Faraday sheild winding outside the magnetic circuit (Around the
outside of the core) which is easy to deal with.
Every other
Currently I'm planning to terminate the 3 conductor cable with a 4 pin 1.25mm
JST connector: 9V/Gnd/NC/HV.
Jt
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Yes, I will keep rethinking it until I make it work! That's why I have 18
patents.
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http://www.tayloredge.com/storefront/SmartNixie/DataSheets/Datasheet_SmartNixie.pdf
If you look at Fig20 of the above data sheet, it shows the voltage on the "6"
cathode transistor while the tube cycles continuously from "0" to "9". As you
can see, the voltage on the transistor is not a single
I was talking to Cincon and they might actually be able to either sell me
unwelded units for modification or even make a custom unit.
How many people would be interested in an AC adapter that puts out 9V and
170V at 15W total? These could also be done in a 9V/300V output version.
jt
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3 would work just fine at 600x3=1800V vs 800x2=1600. I will switch to the 1KV
parts since I already have PWBs.
The forward bias efficiency impact will be minimal for two vs three diodes as
the forard voltage at these low currents is so much smaller than the output
voltage.
It may even be a
The probe was connected right at the new HV winding where it enters the
rectifier pair.
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Shorting the HV output to the 9V output will destroy the 9V output circuits:
Rectifier, reference, opto coupler etc as well as probably the user circuit
(Unless it is protected). This can't be avoided because of the energy stored
in the HV capacitor. This of course would be the same situation
Just modified a second unit... so easy. By adjusting the output winding
turns I should be able to get just about any voltage I want, i.e. 300V for
a dekatron project etc. I replaced the 2 conductor cable with a 3 conductor
cable that can handle the high voltage.
Anybody want this unit? On
eapage distances.
> Also, this is not strictly still UL recognized since you modified it,
> but it's close enough. Do you consider it to be as safe as the original
> unmodified supply?
>
>
> On 10/13/15 5:35 PM, taylorjpt wrote:
> > Just for fun I modified a Cincon TR1509
My "Thin" wire is #43 or #50. This stuff feels like wire brush bristles when I
use it.
Running a long time test: 185V at 75mA plus 9V at 100mA. Diode temperature
rise is 8C and ripple on HV is 78mV RMS. Going to let it run til Saturday
morning (When I need my bench back).
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High frequency switchers use ferrite EE cores. You cant really see it from
the picture but the center posts are slightly shorter than the legs (About
0.015" total) and they are glued together with a drop of epoxy on the legs
to hold them together. The reason that they gap core is to lower the
Here's a closeup of the re-sealed housing with the re-fitted strain relief.
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A more elegant method for adding the 3 conductor cable (Than that showed in
my photo) is to take the original strain relief and pull out the wire and
then drill it out. The new wire is then slipped into the strain relief.
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Would anyone like one of these modified units to play with? I am getting 300
meters of good 3 conductor high voltage cable and plan to terminate it with a 4
pin 1.25mm JST connector. These will be the high voltage regulated versions.
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Thanks, I should have spent more than 15 minutes on it! Here is an update,
hopefully I didn't add more errors than I fixed.
On Friday, October 16, 2015 at 4:06:55 PM UTC-7, A. Nonamus wrote:
>
> I think there's a small typo in Current Sink.pdf. At the end of the
> description for the circuit
Using the high voltage output as the regulated rail really works well! The
low voltage output only varies by about 15% for a high voltage load from 0
to 75mA (The 170V was rock solid). A few more benefits from this
implementation, and this mod in general:
1. No boost converter heating in
Most nixie controller circuits don't use that much power, most of the power is
used from the high voltage to light the displays. This modified wall adapter
technique actually delivers more usable power for a given adapter power because
the adapter efficieny is about 80% but if you take the low
I did the same process on an HDP24-1AWA01FZ (12V @ 2A) of which I have a
couple hundred scrap units and am getting a clean 170V at 140mA. These
units are welded better so I should find an easier way to open them.
This is so much easier than the way I tried to do it years ago by trying to
You are better off using the highest main output voltage you can tolerate
because of the relatively poor coupling of the low and high voltage
windings that results in an error in the un-regulated output (In this case
the 170V for instance): This error is manifested as a change in the high
Just for fun I modified a Cincon TR1509 wall adapter (9V at 1.4A rated) so
that now it puts out the original 9V plus a regulated 170V at 75mA (13W
total for both outputs). This requires re-winding the transformer and then
adding 2 diodes and a capacitor. The original secondary is 2 x 15T of
No closer than about 0.100 from the top of a transformer to the nearest
component on the adjacent board.
jt
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The flash is the charge coupled from the fast rising transistor drains
coupled into the gates that turns on all segments just before the processor
boots and sets all segments to off. This is the result of avoiding putting
pull down resistors on every gate for space considerations.
The first
Note that every device is tested for 100% functionality including all
addressing modes and all drivers. This testing is all done with an
automated tool through the same I2C interface that you are using. Be sure
that SDA and SCL are properly connected with 2.2K pull ups and the
interface is
*2) There is no pull down on the FET gate: This is the problem I first
thought. This will reduce the efficiency of the circuit. The 330 Ohm
(written on the board, but look, there is a 270 Ohm resistor installed)
will discharge the gate in a given time. The IRFD has a 6nC gate charge.
The 270
...And I thought optimizing a switching power supply was supposed to be
difficult!
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Ok, these will go out in order of the requests here startin tuesday 12/15 (in
maui till then).
Jt
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I sent the first fully integrated unit out a few weeks ago (can't remember to
whom) so when I get some feedback I've got 10 more that I can finish up and
send out to the first 10 emails, starting NOW; 1 per person, 170V and 9V
output at 15W total.
Jt
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I no longer ship to Germany because it takes a long time or gets lost all
together and then the German customers open up ebay and paypal cases against
me. If thr packages ever get there, not a single one of them will admit to it.
I wash my hands of German customers!
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Its just not worth the effort and stress, and as mentioned elsewherw you can di
everything right and still get stuck wheter from malice or incompetence. Add
to that when these "missing" parcels never come back indicating they were
delivered or destroyed: Not once has a German customer
The design has not changed in 8 years nor the price that I charge for it so
there is really no need to update the website.
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The USPS tracking you display is only the customs acceptance and will NEVER go
beyond that... USPS tracking only works in the US and Canada. More
supprisingly, your german customer admitted to receiving the package!!!
0.00% of my experiences in this regard resulted in a refunded order
The Kr85 is a gas in the tube that decomposes by beta decay to supply an
ionization potential to allow the display discharge to start quickly. The
beta particles can't penetrate glass or ceramic of the envelope but when
broken open you can read it with a Geiger counter.
The segment cathode
The problem I had with the whole situation is that I NEVER had a disputed
package returned from Germany, telling me that they eventually got their
package but never fessed up to it. Either way it was no longer worth the
effort of annoyance so I cut them off a couple years ago. I tried to
I have a pile (~1K) 11 digit calculator displays and eventually settled on a
0.5mm thick double sided translator board installed with conductive epoxy. The
connection now becomes a simple DIP header: http://www.ebay.com/itm/140729423185
I remember having a bag of the clips back in the '80s and
An important aspect of the filament has not been discussed in this thread:
Yes, the filament needs to be heated so that it emits electrons efficiently
but it also sets the potential difference between the cathode (Itself) and
the anodes (the segments). For the later reason you can't simply
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