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1. Traffic Lights: Bulbs & LED

  • Published: 2009-08-22T15:34:45+00:00
  • Duration: 121
  • By WpgCameraMan
Traffic Lights: Bulbs & LED

Bit of background. Graduated from SWTC Industrial Electronics way back in the day, so I love gadgets and in my spare time like to keep the skills up with the odd project. Just as the Red Light Camera (RLC) on Sherbrook was being put into operation, I did a news story and got into the department off William where they designed and built the traffic signals. It was odd seeing all these boxes and whatnot inside, all open and wires hanging out. What stood out for me was the 6 ft. tall rack filled with what can only be described as the inner-workings of Wells' Time Machine. A rambling collection of dials, tumblers, energized fingers, belts, gears, and just for fun a flux capacitor in the form of a modern logic board with 7-segment displays and screw down terminals. A bundle of a few dozen wires went from various levels of the rack into the wall, and as I was told, fanned out to half the city's intersections. As tempting as it was to drop a penny into the works, this steampunk supercomputer was orchestrating the rush hour traffic chaos for most of central Winnipeg, and had been since before the dinosaurs got the big dirt nap. Right there, in a busy hustle bustle shop, the brain that no one dared disconnect for fear of plunging Winnipeg into anarchy. You think something this important would be under glass like the Mona Lisa. I can't over-emphasize the fragility of this set up. Yes, those wheels have been turning a zillion times, and the gear teeth all work well, the contacts still contact. But what IF something failed in there. Today, you can download an app for an iPhone that can do the work of all the city's control systems. Am I ragging on the traffic division? I suppose there's only so much you can do when the budget says you gotta hook up at $2 micro controller to knob & tube wiring. Anyways, there's the background on where I stand on traffic lights. Let me adjust my tin foil hat, and on with the show. This video shows that a light can indeed be both red AND green at the same time. And also neither red, amber or green. The bonus to this little nugget is that the 'filament' signals happened to be connected to a RLC. I've always been for the RLC, I thought that the technologies involved were bang-on accurate. No room for doubt. Until now. I feel like someone just told me Santa doesn't exist. I had more faith in the RLC's than God herself. I'm very confused by what my eyes are seeing. Lights are on, off, somewhere in between, alone or with a friend. What pops into my mind seeing this, is it really a visible, unmistakable red you are running when the RLC does it's thing? Please don't think I'm going all Zapruder on you, but look at frame 1249. Inside the control box, the power to the amber light has just been disconnected. It's been burning hot & bright for the past 4 seconds, and the filament will take a short time to cool down. From frames 1249 to 1288 that bulb is losing it's glow. Probably would be visible longer if this were shot at night. What might those number mean? This video was shot at 60p, slowed down to play at 10% speed, while on a 24p time line. Exported at 24fps. Whatever that works out to. If I had stronger math skills, I would have been the 3rd Mythbuster. You can go out and see the cooling down with the naked eye. Back to the left... Sorry, I mean, back to the lights. So after a little while, the faint glow of Mr. Red shows up at 1261. Think back to when the last time a lamp was so bright, so sure in it's purpose. Mr. Amber's last stand was at 1248. And now Mr. Red does his best HAL impression at 1300. Think about this for a second. The amber lamp is without power at 1249, and the red doesn't get power until 1261. Something in the traffic controller is saying "Cut power to amber..ok.. standby for power on red....wait..wait for it.....wait....wait... hold on...wait.... NOW.... take red!!". what is the legal definition of this time period ? In TV, any gaps in video between commercials are black frames not earning money. Here, we don't have an energized lamp of any colour. The power is gone from Amber, all you see now is the natural cooling down of the filament, and the time it takes is variable based on ambient conditions, age of bulb, voltage, so on. You can't honestly say this cooling down period is part of that supposed 4 seconds of amber. The amber was in fact fully lit for 00:00:04:00 on the nose. Pre and after glow not counted. So let's assume the glow isn't part of the overall timing of a signal, because the time between the removal of power to amber and giving power to red is bang on accurate every time. Amber starts to cool down, and shortly after, red gets it's power and begins to glow. A similar gap is found in the LED signals from 1257 to 1268. I need a higher speed camera to shoot the LED signals, I suspect there is something going on that can't be picked up at 60p. But in any case, 1261 to 1264, no LED's are powered. I don't understand this. LED's are nearly instant-on or instant-off if you cut the power. And if computers run the show, why does it take so long between lamps ? Even with a backup system checking the state of the lamps, that should be like BANG-done, imperceptible to the eye (it's not) and certainly imperceptible to a higher speed camera. Ok, so where does this fit with the RLC system? I still need to get some footage of this in operation. I wonder when does the logic signal called "red active" registers to the timing and control circuits for the camera and flash bulbs ? When that amber finger loses contact with power ? Or when the red finger runs over it's contact, or a fixed time shortly after the bulb has reached full brightness ? This might seem so nit-picky, but I've heard from many people swear up & down the light was still yellow just before they got caught and thought they could still make it. How unfair would it be if the RLC got 'armed' just nanoseconds after the amber lamp loses power, but to your eyes (especially at night where persistence of vision comes into play), that friggen signal is amber as can be. Suppose the light is red for 80 seconds, and this odd state of lamp power lasts for 1/4 second. This 1/4 second presents a misleading visual 'state' for 1/320th of the length of that cycle. But it's the early stages of the 'red' signal that catches the most people. Going through after 20 seconds is just stupid, shows no care for any state of lights. But when trying to beat the yellow, a your timing error will reward you with a photo even if you are sure it was still amber. You've seen that amber going for the longest time, but you are a pretty good judge of your speed and timing wise, you should JUST be able to make it. Maybe you noticed that amber 2 seconds into it's cycle, and mistakingly thought you have 3 or 4 to go. I'll pick a reasonable number and say that in any intersection, yellow runners will cross the line within the first 2 seconds of the red . Now instead of this 'gap' being 1/Nth of a complete cycle, it's tuned into 1/8th of that 2 second 'gotcha!' time, length of cycle now irrelevant. That small gap in what you see and what is actually happening means there's a 12.5% percent chance your eyes saw some form of amber signal but still got the ticket for blowing a red. All this above stuff doesn't even consider analog sampling errors with current loops in the roadway, and just where exactly does the car have to be in relation to the stop line for the starts to align for that Kodak Moment. It's going to take more time than I have to stakeout a RLC and get a good sampling to figure out these things. And I would have to add the data present on the photo tickets to judge true stop line position and armed vs. lamp state. Would have break the law to stage this. I'll end with 1847 to 1854 where there is again, no definable state. I like 1859. Red Green. Someone jumped the red! No, they went on a green ! I'll look for footage where both directions are shown at the same time, so I can verify if there is an issue here for cross traffic. Viewer's Video Vote: Pretty busy next week, might find edit time for one of these. A) Illegal rush hour left hand turns B) Blowing stop signs in front of a playground Until next time, keep your stick on the ice..


2. Changing Signals

Changing Signals

Douglas County recently replaced all incandescent light bulbs in traffic signals, flashing stop signs and beacons, variable message signs, and crosswalks with L.E.D. (Light Emitting Diode) lights for a total of 90% energy savings.


3. Benefits of Decorative LED Lights

  • Published: 2017-03-14T10:21:23+00:00
  • Duration: 105
  • By Lyndacarter
Benefits of Decorative LED Lights

Innovative Uses of LED lights LED lights are one of those big leaps in technology, and in this case a leap that could save the environment from destruction. A long service life, energy efficiency and 100% reusability are some of the major benefits of installing LED lights. An LED bulb can function for 25,000 hours which is about 20 times longer than traditional bulbs that can function for a mere 1200 hours. It can be used for a number of applications from lighting homes to airports, traffic lights and street lights to architectural lighting and for industrial purposes. Besides these applications LEDs can be used in many innovative ways, here are a few: Bionic Contact Lens: Used in the gaming industry and to help visually impaired, bionic contact lens have been developed LEDs as its core technology. The lens are inserted into the eyes of a person who is visually impaired, bionic lens do not degrade over time and protects the user from cataract or failing vision for the entire duration of their life. In the gaming industry, these lenses could provide the gamer, with a virtual display without restricting his movements for a complete virtual gaming experience. LED Roof Panels Led panels could be fitted onto the ceilings to light up rooms or to create virtual sceneries on the ceiling. LED Wallpapers LED embedded wallpapers are soon replacing traditional wallpapers and wall paints. LED wall papers can emit a smooth glow in a wide range of hues and patterns. LED Light Strips Led strips are available in a wide range of colors and color changing options. And can be used to decorate anything from porch edges, swimming pools and cars to roofs, audio systems, showcases, mirror edges, and stairs. Visit yellowpages-uae.com to Contact Benefits of Decorative LED Lights i.e. at http://www.yellowpages-uae.com/uae/abu-dhabi/led-lighting


4. Best Adjustable Multi Purpose 200 Lumen LED Flashlight I Ever Bought

Best Adjustable Multi Purpose 200 Lumen LED Flashlight I Ever Bought

http://simonflashlights.net/ Best Adjustable Multi Purpose 200 Lumen LED Flashlight I Ever Bought Exactly what the Brightest Flashlight Way Today Having the brightest flashlight can make one really feel unique, a standout. However how is the brightest flashlight established? There is actually greater than one way to measure illumination as well as thus conflicting methods of marking one light as being brighter than one more. A flashlight might be brightest in a qualitative feeling even though one more one may outcome a lot more overall lumens or have a higher luminescent strength. Online marketers, aware of customers' propensity for wanting the brightest flashlights, will make their cases based on that procedure, whether subjective or objective, placing their items at a benefit. Candlepower, now an essentially obsolete term, shows the strength or intensity of an individual beam. Today, a similar measure is the number of lumens each location. This is appropriate if the application needs a narrowly concentrated beam, perhaps in order to illuminate things at a considerable range from the viewer. Nevertheless, a flashlight that produces a solid but narrow beam could not put out that numerous total lumens. This alternate measure is more appropriate for large and dispersive flashlight bulbs, as well as it subjectively feels brighter, so since the light covers a broader location. Various light bulb types have various luminous performances, or capacities for transforming power into light. Incandescent light bulbs are ranked at 8-22 lumens/watt, which is a small number, suggesting that lots of power have to be put on accomplish reputable illumination. This is why old tactical flashlights were so large as well as heavy. On the other hand, light giving off diodes (LEDs) have a considerably greater performance, something like hundreds of lumens/watt. This bulb kind has reinvented every lights application there is. The LED is not only more reliable, it is rather robust, not most likely to fall short from shock, and also it has a durability 25 times greater than that of the ordinary incandescent light bulb. It is no surprise that the LED flashlight has become the brand-new standard. Small batteries give sufficient juice to produce light that is blindingly brilliant. At the same time, such flashlights are very easy to bring, to wield with one hand, and also to position on a rifle. Simply puts, those in law enforcement or the military don't have to compromise portability for illumination. As a matter of fact, leading flashlights are now being personalized for specific applications as well as targeted to niche markets. This suggests that the very best flashlight for a determined purpose could not be the brightest one. For instance, the brightest flashlight in terms of strength is suitable for techniques, for instilling temporary blindness to disarm wrongdoers of crime. But for general functions such a level of intensity is needless as well as unsuitable. Exactly what is brightest in terms of total luminosity is a far better criterion. However, man in the streets may really feel the requirement for extreme illumination. Survivalists and also those that wonder about federal government have the tendency to fall in this camp. Several females are likewise attracted to this form of flashlight due to the fact that it supplies them with a light-weight, conveniently easily accessible ways of protection against male prospective enemies. Still, most people want a brilliant flashlight to see well in the dark. They intend to illuminate their course while walking the pet at night and also at the same time be instantaneously visible to passing traffic. They wish to find items quickly that are somewhat concealed at night hollows of their homes. They also desire a valuable otherwise important device to take with them when venturing out of doors and/or as a kind of unexpected emergency readiness. Right here, other films may be consisted of to complement the common flashlight method, such as strobe lights as well as SOS signaling. These modes offer added protection as well as facilitate interaction with potential rescuers. In the last evaluation, the twin objectives of illumination are (a) to see well and also (b) to be seen. (In certain militaristic circumstances these objectives are in conflict, where (a) is preferred yet (b) is not.) Today these objectives can be understood through a selection of items, any one of which could be thought about the brightest flashlight for your certain purpose.


5. Simon Cree LED Flashlight DU2 - Small Powerful Tactical Flashlight

Simon Cree LED Flashlight DU2 - Small Powerful Tactical Flashlight

http://simonflashlights.net/ Simon Cree LED Flashlight DU2 - Small Powerful Tactical Flashlight Just what the Brightest Flashlight Method Today Having the brightest flashlight can make one feel unique, a standout. But how is the brightest flashlight determined? There is actually greater than one way to determine brightness and thus contrasting ways of marking one light as being brighter than an additional. A flashlight could be brightest in a qualitative feeling although one more one could result a lot more complete lumens or have a greater luminous strength. Online marketers, well aware of consumers' tendency for wanting the brightest flashlights, will certainly make their claims based on that measure, whether subjective or unbiased, putting their items at an advantage. Candlepower, now an essentially out-of-date term, suggests the toughness or intensity of an individual beam. Today, a similar procedure is the variety of lumens each location. This is appropriate if the application calls for a narrowly focused beam, probably in order to brighten items at a substantial range from the audience. Nevertheless, a flashlight that emits a solid yet narrow light beam might not put out that many overall lumens. This alternate procedure is more appropriate for large and also dispersive flashlight light bulbs, as well as it subjectively really feels brighter, so because the light covers a broader location. Different bulb kinds have different luminous effectiveness, or capacities for converting power right into light. Incandescent light bulbs are rated at 8-22 lumens/watt, which is a moderate number, indicating that great deals of power should be applied to attain reputable illumination. This is why old tactical flashlights were so huge and heavy. On the other hand, light discharging diodes (LEDs) have a considerably greater efficiency, something on the order of numerous lumens/watt. This bulb kind has actually transformed every lights application there is. The LED is not just more efficient, it is instead robust, not likely to neglect from shock, and it has a long life 25 times higher than that of the typical incandescent bulb. It is not a surprise that the LED flashlight has actually become the new requirement. Little batteries provide adequate juice to generate light that is blindingly intense. At the same time, such flashlights are simple to bring, to wield with one hand, and to position on a rifle. In shorts, those in police or the armed forces do not have to give up portability for brightness. Actually, leading flashlights are now being tailored for particular applications as well as targeted to specific niche markets. This suggests that the most effective flashlight for an identified purpose may not be the brightest one. For instance, the brightest flashlight in regards to intensity is ideal for methods, for instilling momentary blindness to disarm criminals of criminal activity. But for general functions such a degree of intensity is needless as well as inappropriate. What is brightest in terms of complete luminance is a much better criterion. Nevertheless, ordinary citizens could really feel the requirement for extreme illumination. Survivalists and those who suspect government tend to fall in this camp. Lots of ladies are additionally attracted to this form of flashlight because it offers them with a light-weight, conveniently easily accessible ways of self-defense versus male potential opponents. Still, the majority of people desire a brilliant flashlight to see well at night. They wish to illuminate their course while walking the pet in the evening and also at the same time be instantaneously visible to passing web traffic. They intend to find items quickly that are somewhat hidden at night recesses of their houses. They also want a helpful otherwise important tool to take with them when venturing out of doors and/or as a kind of emergency readiness. Right here, other features may be consisted of to suit the normal flashlight mode, such as strobe lights and also SOS signaling. These methods supply extra defense and also facilitate communication with prospective rescuers. In the final evaluation, the paired goals of brightness are (a) to see well as well as (b) to be seen. (In particular militaristic conditions these goals remain in problem, where (a) is intended however (b) is not.) Today these objectives can be understood with a range of items, any of which could be taken into consideration the brightest flashlight for your specific objective.