[neonixie-l] Re: neon otis elevator 'touch tubes'
I keep on accidentally saying these tubes are 72V, everytime I say that, change it to 71V... On Wednesday, October 29, 2014 12:42:05 PM UTC-5, Joe Zatarski wrote: I tried it out. It's running off of 200VDC from inside a TV with some extra resistance in between. Using 200V - 72V (the rating of my tubes) I get 128V, and I have the original 3600ohms plus another 3500 in series, giving 7100 ohms. All that results in about 18mA of current through the tube. I even get a bit of touch sensitivity when the TV is just starting up, due to AC bleeding through past the regulators I guess. Otherwise, I can tie the trigger input to the 200V (which has that 1.5Mohm resistor in series) and start it that way. On Tuesday, October 28, 2014 2:45:57 PM UTC-5, Joe Zatarski wrote: Attached is the schematic in PDF form. All lines except one seem to be common between all the tubes. Based on my guess of 135VDC tube supply, I think I was right. Tube drops about 72V when on, leaving 63V to be dropped by the total series resistance, 3600 ohms. 63V/3600ohm = 17.5mA. This is below the maximum rating of 25mA according to the 1C21 datasheet. It then looks like an AC supply to the grid would be required to cause the capacitive coupling that allows the tube to work as a touch trigger. I'm not too sure how to figure out this voltage. On Friday, October 24, 2014 10:18:34 AM UTC-5, Joe Zatarski wrote: I will draw up a schematic of what I have in the panel now. I think it'll probably be similar to what the otis docs show: resistor connected in series with the tube, trigger and cathode tied together, and connections for B+ and 'B.O.' (B.O. being the reference line for B+, which also happens to NOT be at the same potential as ground, due to the AC supply tied to it). There seems to be a cap, probably in parallel with something, but I'll take a look. On Wednesday, October 22, 2014 4:51:21 PM UTC-5, Dekatron42 wrote: I think that the best thing you can do is to ask the company who replaced it if they can help you with any schematics, otherwise you will have to draw one yourself from what you have left of the elevator panel and we can take it from there, then you will know what voltages you need and you can do some experiments more easily. /Martin On Tuesday, 21 October 2014 21:00:47 UTC+2, Joe Zatarski wrote: I guess now what I would like to know are some example circuits for power supplies maybe? I guess I need 135VDC, and it needs to be isolated from the mains because it'll also have 150VAC on it relative to earth ground. Easiest to do is get a transformer (if I can find the right voltage output) but how about regulation? Is a properly sized zener diode good enough? On Monday, October 20, 2014 10:41:47 AM UTC-5, Joe Zatarski wrote: So I found an elevator control panel in the garbage. They were replacing a broken one in the dorm next to mine. It appears to have 425A5 'touch tube' trigger tubes instead of mechanical switches. I saw an old thread here about them which had a bit of info. I think you need to connect a 150vac supply between ground and the cathode, then 135vdc across the anode and cathode to use them as a touch button. There needs to be some resistance in series with the tube of course, and the 135vdc needs to be isolated from the ac. Also, I think the trigger input needs to be tied to the cathode somehow. I still have all the wiring in the panel as it was when I found it. There are 12 floors and a basement, so I'm thinking the buttons can represent the hour of a clock as well as an am/pm light. Furthermore, for setting the time, the tubes can still be used as buttons to type in the time. I'd appreciate if I can get some tips on driving circuitry and supplies since these are cold cathode neon tubes, something I have never dealt with before. -- 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@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/69d9ef51-8364-4588-9628-00c1491c16a3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: Just got 80 new Burroughs PIXIE B-9012 tubes, if any interest
I may be interested in a couple, but I'll have to do a little research before I decide to go with these over nixies. I am building a clock out of an elevator panel and I am thinking I should keep it all neon :) I'd need two for minutes display at least. On Monday, October 20, 2014 4:06:34 PM UTC-5, Walter2 wrote: These are the same glass diameter as the common B-5092/8421 nixies (not as tall), but instead have a circle of 10 digits on the face, 0-9 clockwise, with zero at the top. Unlike Nixies, more than one digit can be on at the same time (if cathode resistors are used, rather than a common anode resistor). They need only +150VDC, and very little current. The digit is small, but the appearance is very interesting, like a Dekatron, but with digits rather than dots. I don't ever recall seeing them used in any commercial gear, but presumably they did appear someplace, maybe another list member has that info. They can be used as status displays to show up to 10 data items at the same time. They can almost be used as a single tube for hours as well, because two digits can be on at one time (1+0 to show 10, but NOT 1+1 to show 11, 1+2 to show 12, for example), a novel and more clock-face-like appearance, but not really ideal. The base is a non-standard 13 pin (3 center pins, outer circle of 10), so I have no hope for sockets, but clearly loose pins will work fine to a PCB. Because the numbers appear to race around the outer diameter of the tube when cycled, they would provide very attractive seconds/minutes displays in clocks. Driving is dead simple, ground the cathode to light, just as with regular Nixies, but less current is required (larger resistor). Because more than one can be on at a time, fading is possible to enhance motion. There are also simliar tubes from Philips in europe, but their drive is quite complex, and they are not interchangeable with these. Anyway, I will have them posted up to Sphere Research shortly, or you can just email me for more details. I have the factory data sheet as well, and I will email the PDF to anybody interested. They will be quite cheap, but there's only this one single batch available, no more stock after this, and frankly I was surprised to get these. The appearance of this batch is excellent. all the best, walter ( walter2 -at- sphere.bc.ca ) sphere research corp. ( www.sphere.bc.ca ) -- 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@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9574b130-cd6b-46af-b311-4ab611669662%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: Just got 80 new Burroughs PIXIE B-9012 tubes, if any interest
Hi Walter, I may be interested in a few of these B-9012s depending on the price (quite cheap being relative). How much are they each or by lot? Are these NOS or used? Could you send me the datasheet? Thank you, Jon D. On Monday, October 20, 2014 3:06:34 PM UTC-6, Walter2 wrote: These are the same glass diameter as the common B-5092/8421 nixies (not as tall), but instead have a circle of 10 digits on the face, 0-9 clockwise, with zero at the top. Unlike Nixies, more than one digit can be on at the same time (if cathode resistors are used, rather than a common anode resistor). They need only +150VDC, and very little current. The digit is small, but the appearance is very interesting, like a Dekatron, but with digits rather than dots. I don't ever recall seeing them used in any commercial gear, but presumably they did appear someplace, maybe another list member has that info. They can be used as status displays to show up to 10 data items at the same time. They can almost be used as a single tube for hours as well, because two digits can be on at one time (1+0 to show 10, but NOT 1+1 to show 11, 1+2 to show 12, for example), a novel and more clock-face-like appearance, but not really ideal. The base is a non-standard 13 pin (3 center pins, outer circle of 10), so I have no hope for sockets, but clearly loose pins will work fine to a PCB. Because the numbers appear to race around the outer diameter of the tube when cycled, they would provide very attractive seconds/minutes displays in clocks. Driving is dead simple, ground the cathode to light, just as with regular Nixies, but less current is required (larger resistor). Because more than one can be on at a time, fading is possible to enhance motion. There are also simliar tubes from Philips in europe, but their drive is quite complex, and they are not interchangeable with these. Anyway, I will have them posted up to Sphere Research shortly, or you can just email me for more details. I have the factory data sheet as well, and I will email the PDF to anybody interested. They will be quite cheap, but there's only this one single batch available, no more stock after this, and frankly I was surprised to get these. The appearance of this batch is excellent. all the best, walter ( walter2 -at- sphere.bc.ca ) sphere research corp. ( www.sphere.bc.ca ) -- 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@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5397035b-ab73-4ab9-bee3-045df07e2739%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: Just got 80 new Burroughs PIXIE B-9012 tubes, if any interest
I'm also interested, depending on price. Thanks, Michael Sangster On Monday, October 20, 2014 4:06:34 PM UTC-5, Walter2 wrote: These are the same glass diameter as the common B-5092/8421 nixies (not as tall), but instead have a circle of 10 digits on the face, 0-9 clockwise, with zero at the top. Unlike Nixies, more than one digit can be on at the same time (if cathode resistors are used, rather than a common anode resistor). They need only +150VDC, and very little current. The digit is small, but the appearance is very interesting, like a Dekatron, but with digits rather than dots. I don't ever recall seeing them used in any commercial gear, but presumably they did appear someplace, maybe another list member has that info. They can be used as status displays to show up to 10 data items at the same time. They can almost be used as a single tube for hours as well, because two digits can be on at one time (1+0 to show 10, but NOT 1+1 to show 11, 1+2 to show 12, for example), a novel and more clock-face-like appearance, but not really ideal. The base is a non-standard 13 pin (3 center pins, outer circle of 10), so I have no hope for sockets, but clearly loose pins will work fine to a PCB. Because the numbers appear to race around the outer diameter of the tube when cycled, they would provide very attractive seconds/minutes displays in clocks. Driving is dead simple, ground the cathode to light, just as with regular Nixies, but less current is required (larger resistor). Because more than one can be on at a time, fading is possible to enhance motion. There are also simliar tubes from Philips in europe, but their drive is quite complex, and they are not interchangeable with these. Anyway, I will have them posted up to Sphere Research shortly, or you can just email me for more details. I have the factory data sheet as well, and I will email the PDF to anybody interested. They will be quite cheap, but there's only this one single batch available, no more stock after this, and frankly I was surprised to get these. The appearance of this batch is excellent. all the best, walter ( walter2 -at- sphere.bc.ca ) sphere research corp. ( www.sphere.bc.ca ) -- 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@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/d0fc9f07-6aa3-4b7b-bc0b-c049f5de3db6%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
