Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
On 1/25/12 9:28 AM, H. Carl Ott wrote: On Tue, Jan 24, 2012 at 10:50 PM, David Forbesdfor...@dakotacom.net wrote: On 1/24/12 3:45 AM, dr pepper wrote: Oh es, thanks for the link John. The problem with building a crystal oven is callibration, you need to find out what temp the xtal needs to run at to produce exactly the right freq. You can buy them on ebay for not much money. For that matter, a used rubidium source can be had for a few hundred dollars. Few hundred? I just got one from ebay (fe-5680a) for 43.00 delivered. Going rate is under 50 bucks. Just have to figure out what I'm going to use it for. The price must have come down - I admit that I haven't looked for a couple years, since a guy doesn't need TWO rubidium sources. Unless he's the proprietor of http://www.leapsecond.com that is. In that case, he needs a suite of them to get much better composite accuracy. And a cesium clock to calibrate them against. -- David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
I'll run a search for them then. I didnt really have much look here in the uk for a crystal oven, but I did find a good webpage for a project oven, only simple maths and very stable results. I dont really have a desperate need for such a thing, its just an interest, I've outgrown decoding time signals. On 25 Jan, 17:04, David Forbes dfor...@dakotacom.net wrote: On 1/25/12 9:28 AM, H. Carl Ott wrote: On Tue, Jan 24, 2012 at 10:50 PM, David Forbesdfor...@dakotacom.net wrote: On 1/24/12 3:45 AM, dr pepper wrote: Oh es, thanks for the link John. The problem with building a crystal oven is callibration, you need to find out what temp the xtal needs to run at to produce exactly the right freq. You can buy them on ebay for not much money. For that matter, a used rubidium source can be had for a few hundred dollars. Few hundred? I just got one from ebay (fe-5680a) for 43.00 delivered. Going rate is under 50 bucks. Just have to figure out what I'm going to use it for. The price must have come down - I admit that I haven't looked for a couple years, since a guy doesn't need TWO rubidium sources. Unless he's the proprietor ofhttp://www.leapsecond.comthat is. In that case, he needs a suite of them to get much better composite accuracy. And a cesium clock to calibrate them against. -- David Forbes, Tucson AZ- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
So the number of cycles in a day has been abandoned, at least the info was correct. The sites are cool that show you the load, not many of those gigawatts are powering nixies. I'm surprised forensics can analyse recordings for mains hum at all these days, everything for the last 10 years has a switching supply and usually has an excellent hum rejection, any kind of hum is gonna need very fancy kit to pick up, unlike the old days where hum was allways there. I have a little experience of dealing with 50hz hum, for a while I was interested in vlf radio, 50hz powerline buzz is vlf's enemy. On Jan 20, 5:44 pm, micha...@aol.com wrote: Got some recordings you are worried about? heh. In a message dated 1/20/2012 9:42:15 A.M. Pacific Standard Time, nickst...@gmail.com writes: That's cool, but also a little creepy;-) -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
On 1/24/12 3:45 AM, dr pepper wrote: Oh es, thanks for the link John. The problem with building a crystal oven is callibration, you need to find out what temp the xtal needs to run at to produce exactly the right freq. You can buy them on ebay for not much money. For that matter, a used rubidium source can be had for a few hundred dollars. -- David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
I'm interested in a OXCO if anyone knows a good design. Also thought about receiving radio 4 on long wave 198 kc and dividing down to 1hz, they use a rhubidium oscillator to make the carrier, dont know why, I'm sure someone here does. On 20 Jan, 18:42, Nicholas Stock nickst...@gmail.com wrote: GPS is the way to go...or a DS3231 or similar TCXO... On Fri, Jan 20, 2012 at 10:28 AM, Joseph Bento jos...@kirtland.com wrote: You might have yet to find another location. See http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power... We're about to drop our regulation as well. Joe, N6DGY On Jan 20, 10:45 am, Nicholas Stock nickst...@gmail.com wrote: That's why I moved to the states...;-) ha ha -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
I'm interested in a OXCO if anyone knows a good design. I haven't tried rolling my own, but the concept is simple - pop your crystal into a small insulated enclosure with a heater and thermostat, this avoiding temperature related variations. I generally just buy ready made crystal ovens. These are available various places for various prices. There is a nice selection of affordable ones at Fair Radio: https://www.fairradio.com/catalog.php?mode=viewcategoryid=198 - John -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
thank you all is there an easy way to use Dekatrons to do it thanks mike On Jan 23, 7:23 am, John Rehwinkel jreh...@mac.com wrote: I'm interested in a OXCO if anyone knows a good design. I haven't tried rolling my own, but the concept is simple - pop your crystal into a small insulated enclosure with a heater and thermostat, this avoiding temperature related variations. I generally just buy ready made crystal ovens. These are available various places for various prices. There is a nice selection of affordable ones at Fair Radio: https://www.fairradio.com/catalog.php?mode=viewcategoryid=198 - John -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
On Jan 23, 2:29 pm, mike logan...@gmail.com wrote: thank you all is there an easy way to use Dekatrons to do it thanks mike To do what ? How about an AC line sync timebase using a 'dekatron pendulum' ? The animated .GIF on this overview page: http://threeneurons.wordpress.com/dekatron-stuff/ is that of a pendulum, and here is the circuit: http://threeneurons.wordpress.com/dekatron-stuff/pendulums/ Its drawn using direct AC for power, too, but can easily be modified to run off of a switcher. If you use a switching PS, bring low voltage AC into your box. 9VAC to 12VAC. Use the switcher, for the nixie dekatron voltages. Tap the (low V) AC like shown in the circuit, but make R7 (in the 1st circuit, R9 in the 2nd) 10K, instead of 1M. You can power the CMOS chips from +5V. The 'SWAP' signal will be 1Hz, locked to the household AC. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
Here's an interesting related site: http://www.dynamicdemand.co.uk/grid.htm# -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
On Jan 20, 12:44 pm, Terry S tschw10...@aol.com wrote: Here's an interesting related site: http://www.dynamicdemand.co.uk/grid.htm# Yes - I believe the UK has abandoned long-term 50Hz accuracy - the frequency of the mains has to remain within strict limits, but that variation within those limits is controlled solely by loading/demand and not by the desire to make the number of cycles in a day correct. Here's an interesting tidbit for those with a CSI interest - forensic scientists in the UK have developed a technique to accurate date some digital (and analogue) recordings made in the UK by doing a narrow bandwidth Fourier analysis of the audio around the 50Hz region (mains hum) for the duration of the recording - the variation they pick up is then compared with historical data regarding the known variation in the UK mains frequency to get an accurate date time. Further, they can determine if the recording has been edited (and how) by looking for discontinuities in the expected data. How cool is that? Nick -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
That's cool, but also a little creepy;-) On Fri, Jan 20, 2012 at 9:39 AM, Nick n...@desmith.net wrote: On Jan 20, 12:44 pm, Terry S tschw10...@aol.com wrote: Here's an interesting related site: http://www.dynamicdemand.co.uk/grid.htm# Yes - I believe the UK has abandoned long-term 50Hz accuracy - the frequency of the mains has to remain within strict limits, but that variation within those limits is controlled solely by loading/demand and not by the desire to make the number of cycles in a day correct. Here's an interesting tidbit for those with a CSI interest - forensic scientists in the UK have developed a technique to accurate date some digital (and analogue) recordings made in the UK by doing a narrow bandwidth Fourier analysis of the audio around the 50Hz region (mains hum) for the duration of the recording - the variation they pick up is then compared with historical data regarding the known variation in the UK mains frequency to get an accurate date time. Further, they can determine if the recording has been edited (and how) by looking for discontinuities in the expected data. How cool is that? Nick -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
Got some recordings you are worried about? heh. In a message dated 1/20/2012 9:42:15 A.M. Pacific Standard Time, nickst...@gmail.com writes: That's cool, but also a little creepy;-) -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
That's why I moved to the states...;-) ha ha On Fri, Jan 20, 2012 at 9:44 AM, micha...@aol.com wrote: ** Got some recordings you are worried about? heh. In a message dated 1/20/2012 9:42:15 A.M. Pacific Standard Time, nickst...@gmail.com writes: That's cool, but also a little creepy;-) -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
You might have yet to find another location. See http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/ We're about to drop our regulation as well. Joe, N6DGY On Jan 20, 10:45 am, Nicholas Stock nickst...@gmail.com wrote: That's why I moved to the states...;-) ha ha -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
GPS is the way to go...or a DS3231 or similar TCXO... On Fri, Jan 20, 2012 at 10:28 AM, Joseph Bento jos...@kirtland.com wrote: You might have yet to find another location. See http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/ We're about to drop our regulation as well. Joe, N6DGY On Jan 20, 10:45 am, Nicholas Stock nickst...@gmail.com wrote: That's why I moved to the states...;-) ha ha -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
My source for this isnt necessarily accurate, however they say the mains freq is accurate in the uk over a 24 hour period from 9 am till 9 am, they speed up and slow down the gensets during the 24 hours and at night time they control the speed to get the right amount of cycles for the last 24 hours, ie your clock might speed up and slow down during the day, but at 9 am it'll be spot on. That could be twaddle I heard it on a well known vintage radio forum. The stability of the mains frequency varies depending where you are, the us however has a large grid system and logic states that they'd have to keep the frequency accurate to maintain compatibility for switching suppliers which happens all the time. A 32.768 xtal osc is a good one to start with, the 32.768 is designed for watches and divides down by 2 to 1 hz and they are stable when loaded with the correct capacitance, next up would be a crystal oven, do a google for that, my later designs are synced to the npl msf time code sgnal on 60kc's, you can get a receiver on ebay for a few quid, similar services are in use around the globe. On 19 Jan, 00:35, Lucky dave.lucky.po...@gmail.com wrote: From the National Grid (Who supply/transmit our electricity) System frequency will therefore vary around the 50 Hz target and National Grid has statutory obligations to maintain the frequency within +/- 0.5Hz around this level. However, National Grid normally operates within more stringent 'operational limits' which are set at +/- 0.2Hz. The figure of 50Hz is derived from the alternators rotational speed of 3000rpm, 3200rpm/60Hz for the US. Most government institutions from the Post Office to the Railways used to use mains driven clocks and it was made statutory that the frequency would always average out at 50Hz. Whilst trying to find WHY we chose 3000 and the US 3200 (Which I didn't find) I did come across some interesting sites one being the National Grid themselves with a 'live' frequency graph here:http://www.nationalgrid.com/uk/Electricity/Data/Realtime/Frequency/Fr... and a snazzy live meter here:http://www.dynamicdemand.co.uk/grid.htm# Even better, who says Nixie clocks are not accurate? See:http://www.leapsecond.com/pages/atomic-nixie/including one of David Forbes Scopeclocks both accurate to a few nanoseconds a day! On 18 Jan, 20:00, Dutchgray dutchg...@gmail.com wrote: I guess that the additional question would be: How stable is the mains frequency in the UK? Its supposed to be stable and analogue clocks driven from the mains were once the norm in public buildings. I would use it as a time base.- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
I have heard the same thing about the US grid having the exact number of cycles per day, due to legacy use of the frequency for clocks. I have a Nixie clock based on that (uses mains frequency), and I can tell you that it is not true at my outlets! The clock loses a few minutes every day, which makes it more of a lamp then a clock. Also, the US power grid system is a fascinating thing. The accuracy of the frequency must only be kept in that grid (the nation is split into several grids) and a neighboring grid can be off frequency or phase. The grids are connected through DC links, so power can still be shared over the grid boundaries. On Jan 19, 4:31 am, dr pepper seaking.helicopt...@gmail.com wrote: My source for this isnt necessarily accurate, however they say the mains freq is accurate in the uk over a 24 hour period from 9 am till 9 am, they speed up and slow down the gensets during the 24 hours and at night time they control the speed to get the right amount of cycles for the last 24 hours, ie your clock might speed up and slow down during the day, but at 9 am it'll be spot on. That could be twaddle I heard it on a well known vintage radio forum. The stability of the mains frequency varies depending where you are, the us however has a large grid system and logic states that they'd have to keep the frequency accurate to maintain compatibility for switching suppliers which happens all the time. A 32.768 xtal osc is a good one to start with, the 32.768 is designed for watches and divides down by 2 to 1 hz and they are stable when loaded with the correct capacitance, next up would be a crystal oven, do a google for that, my later designs are synced to the npl msf time code sgnal on 60kc's, you can get a receiver on ebay for a few quid, similar services are in use around the globe. On 19 Jan, 00:35, Lucky dave.lucky.po...@gmail.com wrote: From the National Grid (Who supply/transmit our electricity) System frequency will therefore vary around the 50 Hz target and National Grid has statutory obligations to maintain the frequency within +/- 0.5Hz around this level. However, National Grid normally operates within more stringent 'operational limits' which are set at +/- 0.2Hz. The figure of 50Hz is derived from the alternators rotational speed of 3000rpm, 3200rpm/60Hz for the US. Most government institutions from the Post Office to the Railways used to use mains driven clocks and it was made statutory that the frequency would always average out at 50Hz. Whilst trying to find WHY we chose 3000 and the US 3200 (Which I didn't find) I did come across some interesting sites one being the National Grid themselves with a 'live' frequency graph here:http://www.nationalgrid.com/uk/Electricity/Data/Realtime/Frequency/Fr... and a snazzy live meter here:http://www.dynamicdemand.co.uk/grid.htm# Even better, who says Nixie clocks are not accurate? See:http://www.leapsecond.com/pages/atomic-nixie/includingone of David Forbes Scopeclocks both accurate to a few nanoseconds a day! On 18 Jan, 20:00, Dutchgray dutchg...@gmail.com wrote: I guess that the additional question would be: How stable is the mains frequency in the UK? Its supposed to be stable and analogue clocks driven from the mains were once the norm in public buildings. I would use it as a time base.- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
I have heard the same thing about the US grid having the exact number of cycles per day, due to legacy use of the frequency for clocks. I have a Nixie clock based on that (uses mains frequency), and I can tell you that it is not true at my outlets! The clock loses a few minutes every day, which makes it more of a lamp then a clock. I suspect that's more a problem with the clock than the power frequency. To extract a good timing signal from the polluted hash that is the power line is not trivial, and many of implementations do a poor job. I suspect the one in your clock is such, as the US power grid hasn't lost enough cycles to lose a few minutes a day in a long time (local power interruptions excepted). With mechanical, synchronous-motor clocks, simple inertia rides through spikes, notches, dips, and the like with no problem. With electronic clocks, a fair amount of ingenuity is called for. Try plugging your clock into a power conditioner (if you can find a ferroresonant transformer, this is perfect) and see if it improves. - John -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
have a Nixie clock based on that (uses mains frequency), and I can tell you that it is not true at my outlets! The clock loses a few minutes every day, which makes it more of a lamp then a clock. I suspect that's more a problem with the clock than the power frequency. To extract a good timing signal from the polluted hash that is the power line is not trivial, and many of implementations do a poor job. I suspect the one in your clock is such, as the US power grid hasn't lost enough cycles to lose a few minutes a day in a long time (local power interruptions excepted). With mechanical, synchronous-motor clocks, simple inertia rides through spikes, notches, dips, and the like with no problem. With electronic clocks, a fair amount of ingenuity is called for. Try plugging your clock into a power conditioner (if you can find a ferroresonant transformer, this is perfect) and see if it improves. My wife's LED clock, an old Panasonic one, loses about 5 minutes per week... mains noise is a reasonable idea, John, but wouldn't spikes and such *add* cycles and so make the clock gain time instead of losing it? Lower mains frequency is a symptom of an overloaded grid, what's exactly the case with the Argentina one. Gastón -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
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 -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
Interesting. Yes the grid frequency drops when the generating station is overloaded, the gensets slow down and the output frequency depends on ratational speed, theres an online gizmo for the uk that shows the current frequency, it says at the lower end 'overloaded'. This side of the pond you can get little metal can line filters, I've robbed a couple from scrap computers, you might get somewhere with one of these. I work in a manufacturing plant, we work with polymer and use lots of power, harmonic distortion and reactive power issues are a problem, we have huge filters and power factor correction systems, anyway distortion can produce odd effects, I cant explain exactly what would happen in a clock to make it run slow but I can beleive it!. On 19 Jan, 18:30, taylorjpt j...@tayloredge.com wrote: Here is the modification for 50Hz:http://www.tayloredge.com/storefront/1384_TIClock/1384_60-to-50Hz_Con... Note that there are some errors in the original schematic, cleaned up schematic here: http://www.tayloredge.com/storefront/1384_TIClock/1384.pdf jt -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
Or you could use my scan of the schematic David posted :) http://www.selectric.org/nixie/ticlock.gif On 18 Jan, 03:47, mike logan...@gmail.com wrote: could you show me a simple schematic for it -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
Take care of clocks using the mains as a timebase like the ones posted, they are for 60hz, ok in the us, but wouldnt be any good here in the uk. If you go for a crystal timebase then make sure you get the right crystal, they come in series and parallel flavours, parallel seems more popular, some 'computer' grade xtals can be dissapointing stability wise, ood hc48u type ones seem to be reliable. On Jan 18, 2:42 pm, J Forbes jforbnos...@selectric.org wrote: Or you could use my scan of the schematic David posted :) http://www.selectric.org/nixie/ticlock.gif On 18 Jan, 03:47, mike logan...@gmail.com wrote: could you show me a simple schematic for it- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
On 1/18/12 11:07 AM, dr pepper wrote: Take care of clocks using the mains as a timebase like the ones posted, they are for 60hz, ok in the us, but wouldnt be any good here in the uk. You just need to change the first 7492 frequency divider chip to a 7490, then it will work at 50 Hz. -- David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: trying to wrap my head around making a clock out of this
I guess that the additional question would be: How stable is the mains frequency in the UK? We use it in the US because it is very stable.. I understand that in the former soviet union, the mains frequency was terrible. Whenever I open up old soviet clocks they always have a crystal in them (and old US clocks always use the mains). -Adam On 1/18/2012 10:34 AM, David Forbes wrote: On 1/18/12 11:07 AM, dr pepper wrote: Take care of clocks using the mains as a timebase like the ones posted, they are for 60hz, ok in the us, but wouldnt be any good here in the uk. You just need to change the first 7492 frequency divider chip to a 7490, then it will work at 50 Hz. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
I guess that the additional question would be: How stable is the mains frequency in the UK? Its supposed to be stable and analogue clocks driven from the mains were once the norm in public buildings. I would use it as a time base. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
From the National Grid (Who supply/transmit our electricity) System frequency will therefore vary around the 50 Hz target and National Grid has statutory obligations to maintain the frequency within +/- 0.5Hz around this level. However, National Grid normally operates within more stringent 'operational limits' which are set at +/- 0.2Hz. The figure of 50Hz is derived from the alternators rotational speed of 3000rpm, 3200rpm/60Hz for the US. Most government institutions from the Post Office to the Railways used to use mains driven clocks and it was made statutory that the frequency would always average out at 50Hz. Whilst trying to find WHY we chose 3000 and the US 3200 (Which I didn't find) I did come across some interesting sites one being the National Grid themselves with a 'live' frequency graph here: http://www.nationalgrid.com/uk/Electricity/Data/Realtime/Frequency/Freq60.htm and a snazzy live meter here: http://www.dynamicdemand.co.uk/grid.htm# Even better, who says Nixie clocks are not accurate? See: http://www.leapsecond.com/pages/atomic-nixie/ including one of David Forbes Scopeclocks both accurate to a few nanoseconds a day! On 18 Jan, 20:00, Dutchgray dutchg...@gmail.com wrote: I guess that the additional question would be: How stable is the mains frequency in the UK? Its supposed to be stable and analogue clocks driven from the mains were once the norm in public buildings. I would use it as a time base. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
That would look cool in the dash of my Humvee :) On 17 Jan, 20:55, Dennis daddyvan2...@yahoo.com wrote: I use one as a test bed for programming. Direct drive just hook it up. Now if I could just figure out how to program. :) From: mike logan...@gmail.com To: neonixie-l neonixie-l@googlegroups.com Sent: Tuesday, January 17, 2012 4:58 PM Subject: [neonixie-l] trying to wrap my head around making a clock out of this http://www.ebay.com/itm/190604819318?ssPageName=STRK:MEWAX:IT_trksid... thanks mike -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
could you show me a simple schematic for it thank you mike On Jan 17, 6:42 pm, John Rehwinkel jreh...@mac.com wrote: http://www.ebay.com/itm/190604819318?ssPageName=STRK:MEWAX:IT_trksid... Should be easy enough to make a clock out of it. If you care to multiplex it, you'll need anode drivers and perhaps some BCD buffers. For direct drive, it's ready to go. - John -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: trying to wrap my head around making a clock out of this
Heres a nice little circuit I found, you allready have the 141's in your display modules, so you just need to build the lower part of the circuit and graft it on. The circuit has seconds display, you obviously dont have the tubes for that, you could just construct the circuit and leave out the 141's and the nixies for the seconds, everything else should work fine. It uses 74 series logic which is less common. http://www.google.co.uk/imgres?imgurl=http://www.tuberadios.com/nixie/nixieclock.gifimgrefurl=http://www.tuberadios.com/nixie/nixie.htmlusg=__0X4_oD8koW-GxuwQqQta4xSrqS8=h=701w=965sz=117hl=enstart=4zoom=1tbnid=nCydt-ZM_NQaAM:tbnh=108tbnw=148ei=tmcWT-HEA6Hh4QSux_DlAwprev=/images%3Fq%3Dnixie%2Bclock%2Bschematic%26hl%3Den%26sa%3DG%26tbm%3Dischitbs=1 Heres another that uses 4000 series cmos chips, easily available but you'd have to dump the 141's allready on the boards you have (silly long link but it works). http://www.google.co.uk/imgres?imgurl=http://www.electronixandmore.com/nixieclocks/nixclkv1.gifimgrefurl=http://www.electronixandmore.com/nixieclocks/1.htmlusg=__NHPFewjQxO4Tey-_2dcJdvWaaOo=h=602w=1014sz=28hl=enstart=12zoom=1tbnid=t2dVgcB-JrwFJM:tbnh=89tbnw=150ei=-GYWT7rxEaPi4QSfkNjxAwprev=/images%3Fq%3Dnixie%2Bclock%2Bschematic%26hl%3Den%26sa%3DG%26tbm%3Dischitbs=1 On 18 Jan, 03:47, mike logan...@gmail.com wrote: could you show me a simple schematic for it thank you mike On Jan 17, 6:42 pm, John Rehwinkel jreh...@mac.com wrote: http://www.ebay.com/itm/190604819318?ssPageName=STRK:MEWAX:IT_trksid... Should be easy enough to make a clock out of it. If you care to multiplex it, you'll need anode drivers and perhaps some BCD buffers. For direct drive, it's ready to go. - John- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
