[time-nuts] Hands on digital clock
Hi: http://www.standard-time.com/index2_en.php 4 x 12 meter 7-segment display where the segments are boards held in place by C-clamps. One man can change one segment, but it takes 11 men and a couple of ladders to change two digits. If fewer (wo)men were used the time to make a change would be longer than 1 minute and the clock not be good to a minute. It looks like they started out using 4 bolts at each joint with power tools and later changed to multiple C-clamps. You can buy a DVD movie that can be played on a PC where the video is synchronized to the PC time. For more interesting On Line Hardware Clocks see: http://www.prc68.com/I/timefreq.shtml#OLC -- Have Fun, Brooke Clarke http://www.PRC68.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
It seems to me there is a way to make the segments folding so they could be changed without removing and inserting boards. Kind of like a folding ruler. I'll have to do some experiments with scraps of wood in my shop. On a smaller scale of course. When I was little I used to like forming letters and numbers with my dad's folding ruler. I probably invented the 7 segment display without knowing it. Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com - Original Message - From: Brooke Clarke bro...@pacific.net To: time-nuts@febo.com Sent: Tuesday, February 16, 2010 3:46 PM Subject: [time-nuts] Hands on digital clock Hi: http://www.standard-time.com/index2_en.php 4 x 12 meter 7-segment display where the segments are boards held in place by C-clamps. One man can change one segment, but it takes 11 men and a couple of ladders to change two digits. If fewer (wo)men were used the time to make a change would be longer than 1 minute and the clock not be good to a minute. It looks like they started out using 4 bolts at each joint with power tools and later changed to multiple C-clamps. You can buy a DVD movie that can be played on a PC where the video is synchronized to the PC time. For more interesting On Line Hardware Clocks see: http://www.prc68.com/I/timefreq.shtml#OLC -- Have Fun, Brooke Clarke http://www.PRC68.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.435 / Virus Database: 271.1.1/2689 - Release Date: 02/15/10 07:35:00 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
Hey. You miss the point! It's ART. -John = It seems to me there is a way to make the segments folding so they could be changed without removing and inserting boards. Kind of like a folding ruler. I'll have to do some experiments with scraps of wood in my shop. On a smaller scale of course. When I was little I used to like forming letters and numbers with my dad's folding ruler. I probably invented the 7 segment display without knowing it. Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com - Original Message - From: Brooke Clarke bro...@pacific.net To: time-nuts@febo.com Sent: Tuesday, February 16, 2010 3:46 PM Subject: [time-nuts] Hands on digital clock Hi: http://www.standard-time.com/index2_en.php 4 x 12 meter 7-segment display where the segments are boards held in place by C-clamps. One man can change one segment, but it takes 11 men and a couple of ladders to change two digits. If fewer (wo)men were used the time to make a change would be longer than 1 minute and the clock not be good to a minute. It looks like they started out using 4 bolts at each joint with power tools and later changed to multiple C-clamps. You can buy a DVD movie that can be played on a PC where the video is synchronized to the PC time. For more interesting On Line Hardware Clocks see: http://www.prc68.com/I/timefreq.shtml#OLC -- Have Fun, Brooke Clarke http://www.PRC68.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.435 / Virus Database: 271.1.1/2689 - Release Date: 02/15/10 07:35:00 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
It seems to me there is a way to make the segments folding so they could be changed without removing and inserting boards. Kind of like a folding ruler. I'll have to do some experiments with scraps of wood in my shop. On a smaller scale of course. Several years ago, I walked by one of the solar powered radar sets that shows you your speed on a pair of big 7 segment displays. It was clicking as the displayed speed changed so I stopped to look at it. The segments rotate about the long axis. So think of flipping the ruler segments over rather than folding them. -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Tuesday, February 16, 2010 4:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Hands on digital clock It seems to me there is a way to make the segments folding so they could be changed without removing and inserting boards. Kind of like a folding ruler. I'll have to do some experiments with scraps of wood in my shop. On a smaller scale of course. Several years ago, I walked by one of the solar powered radar sets that shows you your speed on a pair of big 7 segment displays. It was clicking as the displayed speed changed so I stopped to look at it. The segments rotate about the long axis. So think of flipping the ruler segments over rather than folding them. Those are very nifty displays. I can't recall when I first saw them, but it has to have been back in the 80s or perhaps 70s. The display element is magnetized, and they have a coil behind it that gets either a positive or negative pulse to flip it. I seem to recall some sort of capacitor and SCR circuit was used. They're nice because they don't consume any power when not changing, and can be artificially illuminated as bright as you like. The signaling is pretty robust, so you can put the display at the end of a long wire, too. They aren't very fast, though. You couldn't display motion video. But for a time nut? Sure. You could carefully balance them for aerodynamics, and actuate them with floats and falling weights from your clepsydra, for instance. Some sort of fluidic water level to 7 segment decoder would be needed, but that could be very fun to design with buckets and counterweights (e.g. you make a 3 input AND gate with a bucket that holds 3 liters of water, counterweighted with a 2.5 kg weight) Hmm, you sort of inherently get a thermometer code from a clepsydra, so you need a thermometer to 7 segment decoder. I envision a giant jacquard loom or piano roll scheme, with holes to fill or drain the weights that turn the segments. Air pressure is also legal, I suppose. It kind of depends on whether you need it to be totally gravity driven, or whether a pump/compressor is ok. (If you've ever seen the Villa d'Este in Tivoli, near Rome, you'd be amazed at what can be done with air and water pressure, ALL gravity fed) http://en.wikipedia.org/wiki/Villa_d%27Este (which is actually a pretty lame description) google for villa d'este organ fountain and you'll turn up some youtube video. http://www.youtube.com/watch?v=gGJumf6m44M is one of them ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Magnus Danielson Sent: Tuesday, February 16, 2010 5:01 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Hands on digital clock Lux, Jim (337C) wrote: (If you've ever seen the Villa d'Este in Tivoli, near Rome, you'd be amazed at what can be done with air and water pressure, ALL gravity fed) http://en.wikipedia.org/wiki/Villa_d%27Este (which is actually a pretty lame description) google for villa d'este organ fountain and you'll turn up some youtube video. http://www.youtube.com/watch?v=gGJumf6m44M is one of them As I recall it, it was an hours bus ride from Termini, so it is a nice day-activity to leave Rome and visit Villa d'Este and Tivoli. It was a bit cold when I was there over 20 years ago. About 2 hrs on the Metro and COTRAL bus. Big difference between getting the local and the express bus. The colder temperature is an advantage in the summer, when Rome is hot. That's why Hadrian built his palace up there, and later Pope Ippolito(?) did too. Hmm... fluidistor counter, BCD decoder feeding small sprinklers for fluid-digital display? PPS electrical input controlling a single electrical-to-air-burst conversion. GPS-controlled of-course. :) Should be possible to implement. :) Something like a pps (or ppminute) to tipping bucket to dump quanta of water into the clock is what I was thinking. Of course, a more sophisticated approach would be to use the pps to discipline a more conventional (as in what the Greeks used) continuous flow regulator (i.e. a constant level in a container and a small hole). You'd need to compensate for temperature effects on the orifice size and the viscosity of the water (maybe there's a clever way to self compensate? You want the hole bigger as it gets colder, because the water gets more viscous (in an exponential relationship, I think), otoh, it depends if your clepsydra is mass or volume driven) Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Hands on digital clock
Hi Jim: I have samples of two sizes of flipping dot displays, see: http://www.prc68.com/I/LED.shtml#FD was going to see how fast they can be flipped using high voltage drive with a series resistor to lower the time constant, but other things got in the way. Have Fun, Brooke Clarke http://www.PRC68.com Lux, Jim (337C) wrote: -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Tuesday, February 16, 2010 4:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Hands on digital clock It seems to me there is a way to make the segments folding so they could be changed without removing and inserting boards. Kind of like a folding ruler. I'll have to do some experiments with scraps of wood in my shop. On a smaller scale of course. Several years ago, I walked by one of the solar powered radar sets that shows you your speed on a pair of big 7 segment displays. It was clicking as the displayed speed changed so I stopped to look at it. The segments rotate about the long axis. So think of flipping the ruler segments over rather than folding them. Those are very nifty displays. I can't recall when I first saw them, but it has to have been back in the 80s or perhaps 70s. The display element is magnetized, and they have a coil behind it that gets either a positive or negative pulse to flip it. I seem to recall some sort of capacitor and SCR circuit was used. They're nice because they don't consume any power when not changing, and can be artificially illuminated as bright as you like. The signaling is pretty robust, so you can put the display at the end of a long wire, too. They aren't very fast, though. You couldn't display motion video. But for a time nut? Sure. You could carefully balance them for aerodynamics, and actuate them with floats and falling weights from your clepsydra, for instance. Some sort of fluidic water level to 7 segment decoder would be needed, but that could be very fun to design with buckets and counterweights (e.g. you make a 3 input AND gate with a bucket that holds 3 liters of water, counterweighted with a 2.5 kg weight) Hmm, you sort of inherently get a thermometer code from a clepsydra, so you need a thermometer to 7 segment decoder. I envision a giant jacquard loom or piano roll scheme, with holes to fill or drain the weights that turn the segments. Air pressure is also legal, I suppose. It kind of depends on whether you need it to be totally gravity driven, or whether a pump/compressor is ok. (If you've ever seen the Villa d'Este in Tivoli, near Rome, you'd be amazed at what can be done with air and water pressure, ALL gravity fed) http://en.wikipedia.org/wiki/Villa_d%27Este (which is actually a pretty lame description) google for villa d'este organ fountain and you'll turn up some youtube video. http://www.youtube.com/watch?v=gGJumf6m44M is one of them ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
