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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
Came across a 90's vintage IR controller for printing industry (drives Q-H
lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Thanks, -- John English |
#2
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"John E." wrote:
Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Thanks, -- John English Incandescent wires? RCA called them Numitrons. http://www.sphere.bc.ca/test/nixies2.html http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GWYA,GWYA:2006-31,GWYA:en&q=Numitron -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#3
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"John E." wrote:
Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Thanks, -- John English Search for: IEE FFD21 -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#4
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
On Wed, 14 Feb 2007 02:22:46 -0800, John E. wrote:
Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Once upon a time there were incandescent 7-seg annunciator devices, under various names. Minitron and RCA's Numitron are two names, but do a google search on "incandescent" and "7-segment" for heaps of background. |
#5
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
Search for: IEE FFD21
Thanks. No replacements available. So, since this uses the MC14511 driver, which was designed for LED 7-segment displays, all I have to do is provide resistors to each element and rewire for a common-cathode LED display, right? Thanks, -- John English |
#6
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
On Wed, 14 Feb 2007 11:25:34 -0800, John E.
wrote: Search for: IEE FFD21 Thanks. No replacements available. So, since this uses the MC14511 driver, which was designed for LED 7-segment displays, all I have to do is provide resistors to each element and rewire for a common-cathode LED display, right? --- Right. -- JF |
#7
Posted to sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"John E." wrote in message news.net... What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Does it heat up? Voltages? -- .. .. .. .. .. .. .. .. |
#8
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"rebel" wrote in message ... On Wed, 14 Feb 2007 02:22:46 -0800, John E. wrote: Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Once upon a time there were incandescent 7-seg annunciator devices, under various names. Minitron and RCA's Numitron are two names, but do a google search on "incandescent" and "7-segment" for heaps of background. When I was young and enthusiastic, I built a frequency counter that used these. I think it was a Practical Wireless design. It's still around somewhere ... Arfa |
#9
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
John E. wrote:
Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Thanks, Sounds like a Numitron incandescent filament display. These are getting very hard to come by. |
#10
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
James Sweet sez:
Sounds like a Numitron incandescent filament display. These are getting very hard to come by. Purchasing LED 7-segment replacements and associated kit (resistors, etc.) tomorrow to convert to a 21st century technology. -- John English |
#11
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
So, since this uses the MC14511 driver, which was designed for LED
7-segment displays, all I have to do is provide resistors to each element and rewire for a common-cathode LED display, right? Right. -- John Fields A little clarification, please... I'm all ready to start looking for a CC display, when I look at the data sheet for MC14511BCP and it has example circuit hookups for both CC and CA. I thought a driver output was for one or the other "gender", either CC or CA. Am I reading this right? Can I use either without further need of other configuration or circuitry? Seems too good to be true... Thanks, Dave -- John English |
#12
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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data sheet here
http://alldatasheet.net/datasheet-pdf/pdf/11982/ONSEMI/MC14512.html
-- John English |
#13
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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oops... it's here
The data sheet is he
http://pdf1.alldatasheet.net/datasheetpdf/view/11976/ONSEMI/MC14511BCP.html Due to bug in the data base, the previous link pointed to MC14512... Thanks, -- John English |
#14
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
A second reading of the ds shows that, indeed, a transistor is needed to use
a CA display with the MC14511. [gotta stop these early morning designs...] -- John English |
#15
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
John E. wrote:
A second reading of the ds shows that, indeed, a transistor is needed to use a CA display with the MC14511. [gotta stop these early morning designs...] I would do happier with you if you stopped changing thread titles. |
#16
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
I would do happier with you if you stopped changing thread
titles. Sorry, I didn't know this caused a break in thread. My reader simply inserts the re-titled post in the same thread, just with another title. I should have realized that not all reader apps behave the same. Sincere apologies. Will avoid temptation in future. -- John English |
#17
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
"John E." wrote in message news.net... I would do happier with you if you stopped changing thread titles. Sorry, I didn't know this caused a break in thread. My reader simply inserts the re-titled post in the same thread, just with another title. I should have realized that not all reader apps behave the same. Most readers use the message ID and work correctly. -- .. .. .. .. .. .. .. .. |
#18
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
John E. wrote:
I would do happier with you if you stopped changing thread titles. Sorry, I didn't know this caused a break in thread. My reader simply inserts the re-titled post in the same thread, just with another title. I should have realized that not all reader apps behave the same. Sincere apologies. Will avoid temptation in future. I appreciate it. It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. |
#19
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
In article B2RAh.12551$Yn4.2012@trnddc03,
James Sweet writes: Sounds like a Numitron incandescent filament display. These are getting very hard to come by. They used to be popular in petrol pumps in the UK (they are readable in quite bright sunlight). -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#20
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
On Fri, 16 Feb 2007 01:21:33 -0800, John E.
wrote: So, since this uses the MC14511 driver, which was designed for LED 7-segment displays, all I have to do is provide resistors to each element and rewire for a common-cathode LED display, right? Right. -- John Fields A little clarification, please... I'm all ready to start looking for a CC display, when I look at the data sheet for MC14511BCP and it has example circuit hookups for both CC and CA. I thought a driver output was for one or the other "gender", either CC or CA. Am I reading this right? Can I use either without further need of other configuration or circuitry? Seems too good to be true... --- It is. [too good to be true] The device, by itself, is designed to drive a common cathode display as shown in the upper left hand corner on page 6 of this data sheet: http://www.onsemi.com/pub/Collateral/MC14511B-D.PDF Immediately across the page from it is the common anode configuration, which requires an additional transistor and resistor _per segment_ . -- JF |
#21
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
On Fri, 16 Feb 2007 14:46:22 -0500, John Popelish wrote:
John E. wrote: I would do happier with you if you stopped changing thread titles. Sorry, I didn't know this caused a break in thread. My reader simply inserts the re-titled post in the same thread, just with another title. I should have realized that not all reader apps behave the same. Sincere apologies. Will avoid temptation in future. I appreciate it. It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. I've been known to do that on occasion, but when I do I always put new subject WAS: old subject - it might not help with threading, (my reader also threads messages based on the thread rather than the title), but at least you'd know what the previous parts were about. Cheers! Rich |
#22
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"Arfa Daily" wrote in message
... "rebel" wrote in message ... On Wed, 14 Feb 2007 02:22:46 -0800, John E. wrote: Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Once upon a time there were incandescent 7-seg annunciator devices, under various names. Minitron and RCA's Numitron are two names, but do a search on "incandescent" and "7-segment" for heaps of background. When I was young and enthusiastic, I built a frequency counter that used these. I think it was a Practical Wireless design. It's still around somewhere ... Arfa Ahh, yes, -when I was about 14 years old I built a digital clock out of TTL devices from a Popular Electronics plan, which would have featured Numitrons as the display elements. I made what must have been the ugliest printed circuit board ever - my school class used the Mactac and hobby knife approach for making PCBs, which gave incredibly crude results. Sadly, my troubleshooting skills were not up to overcoming my crude construction technique and I never got the darn thing to work - it wasn't until years later I found out the key difference between the 7447 display driver and the 7448 that the fellow at the electronics wholesaler sold me. I may still have the Numitrons sitting in the basement somewhere.. Bill |
#23
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
John Popelish sez:
I appreciate it. And I, appreciating your many contributions to posted questions, will endeavour to make my questions as memorable (in a good way) as possible (c: It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. Eminently logical. -- John English |
#24
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
John E. wrote:
John Popelish sez: I appreciate it. And I, appreciating your many contributions to posted questions, will endeavour to make my questions as memorable (in a good way) as possible (c: It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. Eminently logical. This conversation has been such a nice change from the flame wars I see here, so often. And it is a pleasant experience to finally meet a Vulcan. ;-) |
#25
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
On Sat, 17 Feb 2007 01:37:01 -0500, John Popelish
Gave us: John E. wrote: John Popelish sez: I appreciate it. And I, appreciating your many contributions to posted questions, will endeavour to make my questions as memorable (in a good way) as possible (c: It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. Eminently logical. This conversation has been such a nice change from the flame wars I see here, so often. And it is a pleasant experience to finally meet a Vulcan. ;-) Yeah! So there!!! I guess I'm a Vulgan ;-] |
#26
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
Bill Shymanski wrote:
"Arfa Daily" wrote in message ... "rebel" wrote in message . .. On Wed, 14 Feb 2007 02:22:46 -0800, John E. wrote: Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Once upon a time there were incandescent 7-seg annunciator devices, under various names. Minitron and RCA's Numitron are two names, but do a search on "incandescent" and "7-segment" for heaps of background. When I was young and enthusiastic, I built a frequency counter that used these. I think it was a Practical Wireless design. It's still around somewhere ... Arfa Ahh, yes, -when I was about 14 years old I built a digital clock out of TTL devices from a Popular Electronics plan, which would have featured Numitrons as the display elements. I made what must have been the ugliest printed circuit board ever - my school class used the Mactac and hobby knife approach for making PCBs, which gave incredibly crude results. Sadly, my troubleshooting skills were not up to overcoming my crude construction technique and I never got the darn thing to work - it wasn't until years later I found out the key difference between the 7447 display driver and the 7448 that the fellow at the electronics wholesaler sold me. I may still have the Numitrons sitting in the basement somewhere.. Bill Perhaps you should try to get the thing working now that you're armed with more knowledge? If you find the Numitrons and would like to get rid of them I'd happily give you something for a set. I build clocks using odd old display devices. |
#27
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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OK, I get it
John Popelish wrote:
John E. wrote: John Popelish sez: I appreciate it. And I, appreciating your many contributions to posted questions, will endeavour to make my questions as memorable (in a good way) as possible (c: It is not so much a problem with broken threads, for me, as much as it is that I remember the thread title of threads I have been reading. When you change the thread title, I have to go back and review earlier messages to remember what subject we are talking about. Eminently logical. This conversation has been such a nice change from the flame wars I see here, so often. And it is a pleasant experience to finally meet a Vulcan. ;-) Actually i would not credit the curse wars that pass for flame wars currently. Really proper flaming requires proper cited backup. But i got spoiled in the early 1980's when usenet was not full cry baby, bull ****ter, wannabees. -- JosephKK Gegen dummheit kampfen die Gotter Selbst, vergebens.Â*Â* --Schiller |
#28
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
James Sweet wrote:
Perhaps you should try to get the thing working now that you're armed with more knowledge? If you find the Numitrons and would like to get rid of them I'd happily give you something for a set. I build clocks using odd old display devices. Do you have a web site or a link to some pictures? I collect clocks, watches and all things horological and am also interested in constructing unusual time pieces. |
#29
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
In article .net,
John E. wrote: So, since this uses the MC14511 driver, which was designed for LED 7-segment displays, all I have to do is provide resistors to each element and rewire for a common-cathode LED display, right? Most drivers for LED displays (CA3161 etc) have the resistors built in for direct connection. But you should check the data sheet for your particular one. -- *Forget the Joneses, I keep us up with the Simpsons. Dave Plowman London SW To e-mail, change noise into sound. |
#30
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
Anthony Fremont wrote:
James Sweet wrote: Perhaps you should try to get the thing working now that you're armed with more knowledge? If you find the Numitrons and would like to get rid of them I'd happily give you something for a set. I build clocks using odd old display devices. Do you have a web site or a link to some pictures? I collect clocks, watches and all things horological and am also interested in constructing unusual time pieces. I don't, but if you do a search for nixie clock gallery you can find pictures of all sorts built by other people. |
#31
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
James Sweet wrote:
Anthony Fremont wrote: Do you have a web site or a link to some pictures? I collect clocks, watches and all things horological and am also interested in constructing unusual time pieces. I don't, but if you do a search for nixie clock gallery you can find pictures of all sorts built by other people. Since I dug my PIC stuff back out the other day, I've been tinkering around with something I've wanted to do for a while. It's sort of a variation on the propellor clock but with a pendulum, so back and forth not around. I'm able to strobe out messages on a column of LEDs, but I'm not sure a pendulum (even a short one) is going to swing fast enough to give a very readable display. I may have to switch to a ceiling fan version. ;-) |
#32
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
..
Since I dug my PIC stuff back out the other day, I've been tinkering around with something I've wanted to do for a while. It's sort of a variation on the propellor clock but with a pendulum, so back and forth not around. I'm able to strobe out messages on a column of LEDs, but I'm not sure a pendulum (even a short one) is going to swing fast enough to give a very readable display. I may have to switch to a ceiling fan version. ;-) It works if the size is small, you can buy these ready made at Target and similar stores. They use an electromagnet to oscillate the pendulum which is about 6" long and very light weight. |
#33
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
On 2007-02-24, Anthony Fremont wrote:
Since I dug my PIC stuff back out the other day, I've been tinkering around with something I've wanted to do for a while. It's sort of a variation on the propellor clock but with a pendulum, so back and forth not around. I'm able to strobe out messages on a column of LEDs, but I'm not sure a pendulum (even a short one) is going to swing fast enough to give a very readable display. I may have to switch to a ceiling fan version. ;-) if the pendulum is short enough (about 1" to centre of mass) it should swing fast enough with gravity alone Bye. Jasen |
#34
Posted to sci.electronics.components,sci.electronics.design,sci.electronics.repair,alt.engineering.electrical
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Odd 7-segment display
"John E." wrote:
Came across a 90's vintage IR controller for printing industry (drives Q-H lamps for drying ink in the paper path) that uses a single-digit 7-segment display that looks like a nixie tube (more like a white-hot wire segment) display. The 16-pin DIP socket is marked IEE-Atlas, and the single-digit display is marked "IEEFFD21 5DX C". Each digit display is 15 pin on a 16 DIP pattern. I've done the requisite Google, but come up with nothing. The drivers on the PCB are MC14511BPC which is a standard CC LED 7-segment driver. What are these? They don't look anything like LED segments (I can see each wire-like segment behind the glass front of each digit's display). Can I just replace these with a common LED display? Or are replacements available? Thanks, -- John English Incandescent, but not Numitron ... I think. ISTR that Numitron displays were packaged in glass envelopes, like the Nixie or your garden variety "valve" (tipping my hat to Brits), and were designed to stand upright. Your device, on the other hand, is 16-pin DIP. I have a handfull of these things, purchased new circa 1972 from a small "TTL chips and stuff" mail order company in Missouri (if memory serves) for use in the second digital clock I had designed. (First clock used Nixies) Nixies turned out to be way too bright though, and there were no inexpensive 7-segment LEDs back then. The incandescent wires drew a low of current, and 6 displays required a robust p.s., so I replaced these displays with LEDs as soon as the latter became available. The incandescent displays I have are not marked with a manufacturer's name, just "8-43-19" silk-screened in white paint on one side of the black case. |
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Segment turning | Woodturning | |||
DIY - Small Segment Jig | Woodturning | |||
DIY - Small Segment Jig | Woodworking | |||
Wood Turnings with stone segment and Visa Versa | Woodturning |