[neonixie-l] Re: FS: Mostly working Heathkit 1103 counter

Hi folks, Counter sold and on the way to a local UPS store. Many thanks neonixie! Bob On Thursday, September 8, 2022 at 10:42:17 AM UTC-7 Robert L wrote: > Hi folks, > > Prompted by Johns DMM post, I have a mostly working Heathkit 1103 nixie > counter in fair cosmetic conditi

[neonixie-l] FS: Mostly working Heathkit 1103 counter

Hi folks, Prompted by Johns DMM post, I have a mostly working Heathkit 1103 nixie counter in fair cosmetic condition. All display elements and annunciators light up, all switches seem to be working as well. Counter goes out of lock over significant portions of the input range so definitely

[neonixie-l] Re: Shock hazard - Mr. Nixie ITS-1A clock

: > If this uses an isolated supply (such as from a wall-wart), you need to > touch 2 circuit nodes at different voltages in order to get shocked. > Any chance this was from electrostatic discharge (ESD) ? > > > On Friday, January 28, 2022 at 1:26:31 AM UTC-8 Robert L wrote: > >>

[neonixie-l] Re: Shock hazard - Mr. Nixie ITS-1A clock

AM UTC-8 Robert L wrote: > Hi Terry, > > I guess I could have been more clear... The label plate ink is only > *moderately* conductive; black ink on a somewhat flexible white > substrate... the label is not FR4 pcb material and there are no metal > layers. I have no experience u

[neonixie-l] Re: Shock hazard - Mr. Nixie ITS-1A clock

ing on a PCB? Not clear from your photos. > > It seems unlikely that ink used on a PCB would be conductive. > > > On Thursday, January 27, 2022 at 2:52:25 PM UTC-6 Robert L wrote: > >> Hi folks, >> >> A friend received a rather nasty shock from one of his Mr. N

[neonixie-l] Re: Displaying unused tubes

Hi folks, I've been using low density closed cell polyethylene foam in compartmentalized craft storage boxes for my "inventory". The foam is available in sheets and rolls of various thickness and density with excellent long term stability, excellent shock protection... Try a search for

[neonixie-l] Re: Input voltage protection

> Is input protection worth $5 in parts? For me, it varies with the cost of > the components at risk, complexity to rework or repair, probability of > abuse... > Forgot what may be the most important consideration... Am I repairing a board for my personal use, or is the board going to a

[neonixie-l] Re: Input voltage protection

reference parts if you're running a 3.3V system. (DigiKey LM4040CYM3-4.1-TR $0.33/ea) On Thursday, September 12, 2019 at 6:39:25 AM UTC-7, Robert L wrote: > > Here are a few parts I use on a routine basis... > > I2C digital pot - 10K shown, comes in other values: AD5259BRMZ10-R7

[neonixie-l] Re: Input voltage protection

Here are a few parts I use on a routine basis... I2C digital pot - 10K shown, comes in other values: AD5259BRMZ10-R7 (DigiKey: AD5259BRMZ10-R7CT-ND $2.85/ea) I2C 16-bit ADC: MCP3425A0T-E/CH (DigiKey: MCP3425A0T-E/CHCT-ND $2.24/ea) I2C Isolator... float an ADC or other I2C parts at 200

[neonixie-l] Re: Input voltage protection

My modular clock controller pcb has a MAX4866LEUT and BSL308C MOSFET for input protection... ESD, over-, under- and reverse-voltage protection. Takes very little space using small SMD parts. My controller is a dense board and relatively costly... also a lot of effort to hand assemble. Thought

[neonixie-l] Re: power supplies and radio interference

Sniffing around with E- and H-field probes, the largest contributor I can find are fast edges going over SPI lines on ribbon cable between multi-tube carrier PCB... quite obvious up to and beyond 1.5 GHz. I can see the digit fade activity on the spectrum analyzer... Noise for the first half

Re: [neonixie-l] Re: Jazzed this weekend project fixed HP 3456A bench MM!

Good heads up about the fakes out there! Wouldn't have thought of that... Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to

Re: [neonixie-l] Re: Jazzed this weekend project fixed HP 3456A bench MM!

Hi Bill, I *REALLY* think an off the shelf USB-GPIB interface on a reasonably current computer will be the way to go. There's so much more involved than just the hardware interface! Having a system where the various software and hardware pieces play well together is no small accomplishment.

[neonixie-l] Re: Jazzed this weekend project fixed HP 3456A bench MM!

Hi Bill, " I think my next foray into this is getting a GPIB usb interface and setting up some automated test and data sampling exercises." Check out Rohde & Schwarz Forum... This has become my instrument control environment of choice... Python with some nice extensions and tools. Started

[neonixie-l] Re: Really??

Can't wait to grab these in the last seconds... Not! Anticipa... ...tion! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to

[neonixie-l] Re: Restoring tube which will not light up

I've been conditioning a batch of ZM 1350 with varying amounts of cathode poisoning... Also some rather high initial strike voltages... The log extracts below are from one moderately poisoned tube and may give you an idea of what to expect. Several cathodes on this tube are still not fully

[neonixie-l] Re: US source for French Enamel Varnish - Fire Red?

Hey John, >From your reply: I have tried water based Pebeo Vitrail and been unable to get an even coating. The product I have on order is specified as a solvent based formulation that may be thinned with mineral or white spirit... not a water based solution. Not clear this is what you

[neonixie-l] Re: Rework of NixieSat with Haicom HI-204III GPS?

Hi folks, The firmware developer is John Miktuk located in New York - East coast USA... >From a late-2016 e-mail exchange with John: Feel free to share my email xxx@xxx with others interested. John I've deleted John's e-mail address from this post to hopefully spare him from the robots

[neonixie-l] US source for French Enamel Varnish - Fire Red?

Hi folks, A bit of an old topic, but I'm trying to find a US source of French Enamel Varnish (FEV) - Fire Red... Found multiple sources in the UK, but FEV is restricted for shipping to the US. Yes, there are multiple posts on the group discussing FEV and alternatives used with varying degrees

[neonixie-l] Re: Maker Faire 2019 !!!

Looking forward to seeing the new "Plus" form factor clock! Anyway, I'll be there and wonder if others here on the group are attending as well? Best regards, Bob > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this

[neonixie-l] Re: Rework of NixieSat with Haicom HI-204III GPS?

Hi folks, I've used the most current f/w with a Garmin "GPS18X LVC-5m" with excellent results... fast lock times, sensitive receiver, 1PPS... While the latest f/w does not require a 1PPS signal, the GPS 18X LVC-5m does have a 1PPS signal available if you want to use it. The GPS18X LVC-5m

Re: [neonixie-l] Pricing Insanity

At least this seller adds exclusive packaging!

[neonixie-l] Re: The case of the singing nixie tube

My ears leave something to be desired these days... Singing? What singing! OK. My wife and animals hear it. It's real. I use a small microphone and PC based spectrum analyzer to explore sounds I can't hear. The mic is at the end of a bit of heat shrink tubing close to a preamplifier on a

[neonixie-l] Re: Repair / Troubleshoot an IN-18 Blue Dream

Hi Paul, Jeff very accurately describes how I replace most SOIC and similar low lead count parts... What he describes works and works well! I also really like hot air... That said, here's another technique that I sometimes use and may be a bit easier for you if you don't have tiny diagonal

[neonixie-l] Re: Dummy load

For instance... On Semi FDD3N40 or FDU3N40... 400V / 2 A / 30W in DPAK or TO-251... I usually have a few FDD3N40 on hand and have used them in multiple designs. There are of course many good alternatives! -- You received this message because you are subscribed to the Google Groups

[neonixie-l] Re: Dummy load

Hi Paul, I also like the "simple" current sink circuit approach, but it usually takes a few more parts to get a stable circuit... the most basic design with just a resistor, transistor and op amp tends to "sing"! And there's also some parts selection to be done. See Linear Tech

[neonixie-l] Re: Dummy load

I also like the simple current sink circuit approach, but it usually takes just a few more parts to get a stable circuit... the most basic design with just a resistor, transistor and op amp tends to "sing"! See Linear Tech Application Note 105, figure 200 on page 108:

[neonixie-l] Re: For sale: MOD-SIX_Gen V B-7971 clock assembled, but WITHOUT tubes

Hi folks, The clock is sold... Many thanks! Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group,

[neonixie-l] Re: For sale: MOD-SIX_Gen V B-7971 clock assembled, but WITHOUT tubes

Hi Isaac, Yes... still available. One other person has just expressed interest as well. Nothing for days, then two within an hour of each other. Go figure? Please contact me on my e-mail and we can take this offline. "reply privately to author" Best regards, Bob -- You received this

[neonixie-l] Re: For sale: MOD-SIX_Gen V B-7971 clock assembled, but WITHOUT tubes

Hi folks, Let's see what happens at $750 plus actual cost of shipping tracked, fully insured and signature required on delivery. Best regards, Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop

[neonixie-l] Re: circuit board creation.....

Hi Kerry, I'm also a KiCad fan... I've switched to it and most of the engineers at work have followed along for our non-product boards - test fixtures and such. You will find loads of decent on-line support via YouTube videos and such. The package includes a pcb trace calculator as Greg

[neonixie-l] Re: Shady ZM568M listings

OK... Becomming a bit less willing to extend the benefit of the doubt... Seller has re-listed the remaining tube with pretty much the same questionable working... He ignored my suggested changes... To bad... B -- You received this message because you are subscribed to the Google Groups

Re: [neonixie-l] Re: Shady ZM568M listings

I'll add to the three lessons I posed in my response above... Ask your questions of the seller before bidding! Make sure there's no ambiguity. There were enough flags in the listing for me to have been more careful... Could the seller have had a better phrasing in their listing? Sure... Could

[neonixie-l] Re: Shady ZM568M listings

Hi folks, *I* made a mistake and bought what I thought was a 6 tube clock from this seller at around 4:30 am this morning... and requested that seller cancel my purchase a few minutes later when I realized *MY* mistake... Auction was for one tube only... Note that this was a different

[neonixie-l] Re: PCB fabricator recommendations/comparisons?

I've had good results with SEEED Studio Fusion... A few minor issues recently around the Chinese New Year, but minor and they were addressed and resolved. Keep your board under 100mm x 100mm and 2-layers and you will get 10 boards for $4.90 plus a $22 or more hit for DHL shipping from China.

[neonixie-l] Low cost power supplies for bread board use? Here's one... What do you use?

Hi folks, A couple people have made recent posts mentioning low cost power supplies for bread boarding and bench development. Thought I'd share a supply that has been working well for me and see what others may be using as well. While I have a variety of decent bench supplies, I

[neonixie-l] Re: How to power 18 IN-9?

Sorry Greg, I have to speak up... As you are well aware, there are real hazards working with the AC mains... lethal hazards... hazards only to be approached with proper training, experience and caution. The hazards go way beyond fried electronics up to and including the risk of nasty and

[neonixie-l] Re: Jeff Thomas GPSII

This: https://www.tubeclockdb.com/user-submitted/354-jeff-thomas-gpsii.html I've two modified here at home and a few out in the wild. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails

[neonixie-l] Re: not available 'Omnixie' Smart Wifi Nixie Clock released

On Saturday, March 17, 2018 at 10:32:44 AM UTC-7, philthepill wrote: > > Mouser page shows 0 in stock expected delivery of first batch is middle > of June > Transformer in stock at Digikey for $2.21/ea... ATB322515-0110

[neonixie-l] Re: My little IN-13 Spectrum Analyser

Hi Paul, I've lost count of how many times I've viewed your video... A very nice job indeed! Best, Bob L. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to

[neonixie-l] Re: People Like Neon / Nixies animated GIFs

There's a tag line to make it complete... Dark Hours Design... It's not my day job! Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to

[neonixie-l] Re: NCH8200HV Eagle lbr

Consider making two footprint. One soldered, one for pin sockets. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post

[neonixie-l] Re: NCH8200HV Eagle lbr

I made a symbol and footprint for KiCad... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an

[neonixie-l] Nice power supply on eBay...

Hi folks, A seller has some nice American Power Designs DC-DC converters listed on eBay: item 142427227003 https://www.ebay.com/itm/DC-DC-Converter-180V-35mA-Regulated-Out-10-13V-In-American-Power-Design-/142427227003 I spoke with an engineer at American Power Designs and he believes (but was

[neonixie-l] Re: Can anode current limiting be replaced with cathode current limiting?

One other thought Allen... What I believe is a simulation schematic shows 1 meg pull-downs on the base lines. These may not be necessary depending on other elements of your circuit in the real world. My current design uses 595 shift registers and the outputs are high-Z when disabled (Output

[neonixie-l] Re: Can anode current limiting be replaced with cathode current limiting?

Individual cathode current limiters work great... Stole the idea from Greg's B7971 design. Note the transistors and current set resistors lining the display in the photo below. First light today on this Sperry SP-151 Panaplex. In this case, I'm using individual cathode limiting due to widely

[neonixie-l] Re: ITS1-A on eBay

Here's a contact e-mail for Sergey who sold me several sets of ITS1 tubes: Sergey Alekseev I've confirmed that he has a fair number of ITS1A tubes in stock. These are probably a mix of the "A" and "B" versions, and also likely a mix of white and pink washers. You will have to ask him for

[neonixie-l] Re: SP-151 Segmented display for nixie clock or watch

No more available at this time... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to

[neonixie-l] Re: Panplex question, Sperry SP-33

Cross posting with another Panaplex thread... Search for: "Sperry Panaplex 1973 catalog". You will find the following with a wealth of data on many of the relatively common Sperry displays out there... including pin-outs, drive currents, circuits, etc. information displays:

[neonixie-l] Re: Round Panaplex Display on Ebay

To, From, cross indicator... Looks like a VOR display... found this... http://lampes-et-tubes.info/cd/cd167.php?l=f -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email

[neonixie-l] Re: New nixie power supply released - NCH8200HV

Hi Yan, Many thanks for your quick response! The change you suggest is clear, perfectly meets my needs and I don't anticipate any trouble making the change. Again, MANY THANKS! Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To

[neonixie-l] Re: New nixie power supply released - NCH8200HV

Hi Yan, I have a couple on order from ebay... My application is USB powered and I'll need to implement a shutdown function. Is there a shutdown mechanism on the board that you did not bring out to a pin? I'd be perfectly happy accessing the pin with added wires as needed. Plan "B" is to

[neonixie-l] Re: SP-151 Segmented display for nixie clock or watch

7 now remaining... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to

[neonixie-l] Re: Absolutely gorgeous Z568M Nixie clock on Ebay

Hi Greg, Failure analysis of open traces and wires... This from looking at a couple of large tubes earlier this year... 1) Measure capacitance anode to element and compare with a known good tube. I found significant reduction in capacitance on an element with a break in the lead near the tube

[neonixie-l] Re: SP-151 Segmented display for nixie clock or watch

Now 10 remaining... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to

[neonixie-l] Re: SP-151 Segmented display for nixie clock or watch

This will also be useful! http://www.waynekirkwood.com/images/pdf/Sperry_Gas_Discharge_Clock_Display_Catalog_1973.pdf -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email

[neonixie-l] Re: SP-151 Segmented display for nixie clock or watch

Hi folks, These look like an interesting display to play with and so I just bought 25 on ebay. My intent is to keep 5 for myself and 5 are spoken for by a friend... 15 left... I'll pass the remaining SP-151 displays along to folks here at neonixie at just barely over my cost... $6.75/ea plus

[neonixie-l] Re: Not Nixie related but might be of interest. Large RGB Matrix

Sent a query to Barco a couple of days ago... so far no response. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To

[neonixie-l] Re: Pics of the new release MOD-SIX_7971

> > > > Finally a place for precious... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Hi Alex, Thanks for the comments! Circuit includes a comment that heat will be an issue at higher loads. Components will go 12 V or more at 3 A with small value changes to adjust turn on ramp, but highest I imagine for this implementation will be 12V at 1A which was my design point. Looking

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Thanks Greg... Good points... The circuit is intended to be installed internal to a housed device, but ESD definitely an issue prior to and during installation. Adding belt and suspenders can't hurt.

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Good points... The circuit is intended to be installed internal to a housed device, but ESD definitely an issue prior to and during installation. Adding belt and suspenders can't hurt. And I'm sure we all work at a bench with a grounded mat, wrist strap and good bench hygiene...

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Looking good to me in sim land... circuit meets my design objectives up to and beyond 12 VDC with loads above 3A. Caution: Watch out for heat with higher loads... Small pcb shown will not support the resulting dissipation with these high loads...

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Dual footprint for SOT-23 and SOT-223... Heat mass moved more to center of the small pcb. -- You received this message because you are

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Dual footprint for SOT-23 and SOT-223... Heat mass moved more to center of the small pcb. -- You received this message because you are

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Hi Gaston, Good points... Going deeper on where I am with the design at the moment... I considered the BSS84 early on as I have some in the spare parts bin... but... > BSS84 is a nice part and I use it a lot, but only rated for 130 mA and I'll be running around 200 mA continuous in this

[neonixie-l] Re: Another simple Passive IR clock control alternative...

For the circuit shown and simulated above... there's output rise time and output delay from application of power. These are two different times. In the simulation below, + 5 input power comes on at T=0 and it then takes about a half second for the slow start output to reach ~5 V. The slow

[neonixie-l] Re: Another simple Passive IR clock control alternative...

So I considered using a Negative Temp Coefficient (NTC) inrush limiter for my clock with the three IV-11 filaments in series on the 5V rail... Found an appropriate part after a pretty broad search, but ran into a 100 piece minimum order quantity at $2.50 per each and 6-8 weeks lead time. No...

[neonixie-l] Re: Another simple Passive IR clock control alternative...

So I considered using a Negative Temp Coefficient (NTC) inrush limiter for my clock with the three IV-11 filaments in series on the 5V rail... Found an appropriate part after a pretty broad search, but ran into a 100 piece minimum order quantity at $2.50 per each and 6-8 weeks lead time. No...

[neonixie-l] Re: Another simple Passive IR clock control alternative...

Hey Greg, Filament voltage is only 1 V on these IV-6 tubes, so not a lot of gradient to speak of... and the active current limiter will take care of any in-rush current. Still, I'm seeing relatively well matched voltage drop across the 6 filaments so the simple current limit resistors already

[neonixie-l] Re: Another simple Passive IR clock control alternative...

I've also had generally very good reliability with vfd displays... instrument displays, larger tubes in clocks... Tubes are in this clock are Russian IV-6 with roughly 1.0 to 1.1 V across the filament. Voltage is limited by individual series resistors from the nominal 5V supply. Filaments are

[neonixie-l] Another simple Passive IR clock control alternative...

Hi folks, Pretty much all my clocks have some form of passive IR control to avoid burning tubes when no one is looking... In many cases the PIR control is accomplished with modifications to the controller board, but some of the clocks are more of a pain to modify than others. In particular, on

[neonixie-l] Re: 7971 nixie tube problem

Complete 73 issue from July 76... See here: https://ia902601.us.archive.org/31/items/73-magazine-1976-07/07_July_1976.pdf 73 de Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from

[neonixie-l] Re: Nixie Tester & Healer for IN18 Nixie Tubes

OK... I'll play... First, I'm also a fan of Marcin's testers and have been very appreciative of his excellent customer support! The design below came about following a conversation with Jeff W... My thanks to him for the impetus to do (overdo?) the project! I also find built-in meters to be

[neonixie-l] Re: Nixie Tester & Healer for IN18 Nixie Tubes

> > OK... I'll play... > First, I'm also a fan of Marcin's testers and have been very appreciative of his excellent customer support! The design below came about following a conversation with Jeff W... My thanks to him for the impetus to do (overdo?) the project! I also find built-in meters

[neonixie-l] Re: OT: Eagle is now subscription-based

An example of support for the KiCAD community: https://home.cern/about/updates/2015/02/kicad-software-gets-cern-treatment -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an

[neonixie-l] Re: OT: Eagle is now subscription-based

One more happy KiCAD user... more than ample for my hobby scale projects of no more than a few sheets. Learning curve was not steep and have been happy with both schematic capture and layout. Using heavier weight commercial tools at work... prefer KiCAD for most everything I'm doing.

[neonixie-l] Re: OT: Lateral thinking: Cheap SMT reflow oven...

Another ControlLeo user here. Have built two of them... one for home use, one on a bench at work. Achieving excellent results with only a small sensitivity to placement of the temp sense thermistor. I use lead free paste for reflow, leaded solder for re-work. Toying with upgrading my

[neonixie-l] Re: A finished in-14 nixie clock from a beginner

Very very nice! Knob, buttons and toggle are nice details as well! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To

[neonixie-l] Re: A simple mod for Passive IR sensors... A toggle switch setting clock to: ON / PIR-controlled / Off

A friend made a good point by private e-mail... The mod as originally shown will potentially place +5 or GND directly on a processor GPIO pin. Not a good idea... All of my devices have a series resistor on their PIR input pins - typically 10k. In most cases there are ESD clamps on my designs

[neonixie-l] Re: A simple mod for Passive IR sensors... A toggle switch setting clock to: ON / PIR-controlled / Off

A friend made a good point by private e-mail... The mod as originally shown will potentially place +5 or GND directly on a processor GPIO pin. Not a good idea... All of my devices have a series resistor on their PIR input pins - typically 10k. In most cases there are ESD clamps on my designs

[neonixie-l] Re: A simple mod for Passive IR sensors... A toggle switch setting clock to: ON / PIR-controlled / Off

A friend made a good point... This mod as originally shown will potentially place +5 or GND directly on a processor GPIO pin. Not a good idea... All of my devices have a series resistor on their PIR input pins - typically 10k. In most cases there are ESD clamps on my designs as well. This is

[neonixie-l] Re: PV Electronics R568 Clock Project With Black R|Z568M Nixie Tubes

Hi Edward, Check out Autodesk Fusion 360... It's a very powerful 3D CAD/CAM program that I've recently started using. The learning curve is modest and there is excellent support from Autodesk as well as a large user community. Youtube videos and such... Fusion 360 will also support laser

[neonixie-l] A simple mod for Passive IR sensors... A toggle switch setting clock to: ON / PIR-controlled / Off

Hi folks, This is a *VERY* simple modification I'm making to the PIR sensors on my clocks. I was going to add this as a response to Edwards build thread but thought it might be of more general interest... The mod is simple and I'm finding it quite useful. I've added a center-off SPDT toggle

[neonixie-l] Re: LIXIE DISPLAYS

> The Lixie displays had been out of stock for a while, but I requested > notification from the Tindie site for when they were available. I ordered a > set within minutes of receiving the back in stock notification a few days > ago. They were again out of stock shortly after my order. > The

[neonixie-l] Re: Four NL-8091 on ebay

Tulip mania or tulipomania... Check out Wikipedia. Just woke up thinking of this and watched the last minute or two of the auction. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from

[neonixie-l] Re: Four NL-8091 on ebay

I keep thinking of tulips... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Michael - Thanks for the comments! I do like the IN-17, it's just too small if they will be used for both the buddy tube and seconds. I have some 6091 which would be a nice choice for the seconds... As far as long life, the 7011 tubes will not be run often and certainly not when there's no one

[neonixie-l] Re: Well I tried, big tubes on ebay this am

I'll look into other tubes... Will also want a buddy tube for the 10 hours place. Was forgetting about cathode poisoning prevention and would want to cycle all digits for this. As I said, this will evolve for some while before any material is cut! B -- You received this message because you

[neonixie-l] Re: Well I tried, big tubes on ebay this am

OK... I think I know what I want to do. A clock! Go figure... Probably just hours and minutes with the 7011 tubes as hours and smaller tubes such as Z5600M or B-6091 for minutes. As Paul A. suggests above, with hours on the 7011 tubes, only 05:xx and 06:xx are missing digits. I'd include

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Finally a few free minutes at the end of the day... Cap meter results compelling for open digits. All pins on both tubes measured with respect to the anode... > Pins that are not connected per the Burroughs data sheet and dark digits all measure ~3 pF or less with one N/C pin somewhat higher

[neonixie-l] Re: Well I tried, big tubes on ebay this am

> > Will check into the heater/giver idea... Need to better understand this! > Have also thought about a glass crack sealer, but the crack is less a crack and more a flaked off piece of glass. Probably happened decades ago with a glancing blow. I think better to leave the tubes in as-found

[neonixie-l] Re: Well I tried, big tubes on ebay this am

I mentioned TDR earlier in the thread and actually was not completely joking... Will probably give it a try over the weekend... I can send a pulse with a sharp edge into the electrode and see how long it takes for a reflection to come back. Fast return = short wire attached, longer wait for

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Using a couple of Keithley Source Measure Units in series as a high voltage supply. (I have a nice bench at work!) These let me go up to 420 volts at 100 mA with the pair in series. I took normal polarity up to about 330 volts measured across the tube at 15 mA this afternoon... no series

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Funny you should mention a plasma globe... I have one arriving tomorrow. Was thinking of one as a quick and dirty check for gas inside theenvelope. I'll try running one or more of the unresponsive segments for awhile... Not optimistic as it looks like glow just near the tube base. Not a hint of

[neonixie-l] Re: Well I tried, big tubes on ebay this am

"Will peak in with a stereo microscope later tonight." No need for the scope - can see the tip of the pin glowing down at the base. A very small and somewhat out of position decimal point? B -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Started at 300 VDC for initial testing... The high voltage to help with poisoned elements or getting ignition if low gas pressure. Now running 200 V with 12k series resistor and the tube self limits at 5.3 mA on the "8" digit. The small glowing spot at the base for digit "6" with ~2 mA tube

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Some of the missing digits have very small hot spots near the base... Power supply in current limit. Not going to risk burning internal connections! One or two show as open with no measurable current flow... Testing at 300 VDC, 12K series and backup of a current limit on the HV supply on my

Re: [neonixie-l] Super quiet nixie PSU

> > Hi John, > > This appears to be transformer T1 referenced in the 250 VDC supplies: > https://www.digikey.com/product-detail/en/eaton/CTX210605-R/513-1121-ND/667400?WT.srch=1=CjwKCAjw387JBRBPEiwA5FfUyxgNhpPEpvf9GerY5U0bPH8-79L9pyZ_1q99CBLjLvq7-DWh248tEhoCywUQAvD_BwE $6.50/ea and in

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Yup... I'm here... And will report when they arrive and I have a chance to test them. I don't usually gamble, but these are unlike any I'd seen and seemed worth the risk. Fingers crossed for at least one working tube. Stand by for a report later this week... Anticipa tion! B --

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