LED Lights and Garage Door Opener???
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From: krw on 20 Apr 2010 18:37 On Mon, 19 Apr 2010 21:19:16 -0700, "JosephKK"<quiettechblue(a)yahoo.com> wrote: >On Thu, 15 Apr 2010 18:09:51 -0500, "krw(a)att.bizzzzzzzzzzzz" ><krw(a)att.bizzzzzzzzzzzz> wrote: > >>On Thu, 15 Apr 2010 11:06:39 -0400, Spehro Pefhany >><speffSNIP(a)interlogDOTyou.knowwhat> wrote: >> >>>On Thu, 15 Apr 2010 14:12:23 +0200, "PovTruffe" >>><PovTache(a)gaga.invalid> wrote: >>> >>>>Just one thought: why did not they design traffic lights with RGB LEDs ? >>>>They should be much cheaper with a single lamp. >>>>However we are all so used to 3 lamp traffic lights... >>>> >>> >>>For people that can't distinguish colors it's certainly better.. since >>>they seem to be standardized in most places in North America with red >>>at the top and green at the bottom. >>> >>>Of course some of the outlying settlements, such as Britain and >>>Quebec, have their own quaint customs: >>> >>>http://en.wikipedia.org/wiki/File:Modern_British_LED_Traffic_Light.jpg >>>http://photos-e.ak.facebook.com/photos-ak-sf2p/v323/26/109/517132740/n517132740_1211892_8628.jpg >>> >>>I'm old enough to remember driving in NYC with the two-color lights >>>(red and green on simultaneously rather than amber), which always >>>struck me as being more efficient. >> >>The ones I liked, also in NY, were standard three-color lights but the yellow >>lit during the final part of the green cycle, warning that the light was about >>to change to yellow. It seems they replaced that with a delay after red, >>before green the opposite direction. > >Thanks for this bit of minutia. It explains some of the dumber design >decisions i have seen in traffic signal timing. > >And i think that the yellow overlap is a really good idea. Though not as >good as all red intervals. I think the all-red interval is the replacement for the green-yellow. One is not to enter an intersection on red, where with the green-yellow one doesn't run a yellow. The only advantage of the green-yellow over the all-ways red is that it can be seen. That's its disadvantage too; it will be run.
From: Michael A. Terrell on 20 Apr 2010 20:51 JosephKK wrote: > > On Thu, 15 Apr 2010 18:09:05 -0400, "Michael A. Terrell" > <mike.terrell(a)earthlink.net> wrote: > > > > >Joel Koltner wrote: > >> > >> "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote in message > >> news:4BC750B9.C003B50D(a)earthlink.net... > >> > They didn't. The LED lamps are retrofitted. They did the red first, > >> > in my area. > >> > >> Hmm... I wonder why red? Spends the most time on? If one color is going to > >> fail, presumably people will just stop anyway, so why not make it the red one > >> that'll fail anyway? > > > > > > My guess was that they were replacing more red lamps, and started the > >conversion to LED as they failed. > > Depends a bit on the locale, mature city, county and state level systems > were on a regular, say 6 month, complete relamping schedule. The > maintenance crew took the old lamps home where lasted for decades. > LED signal modules however have a 5 or more year replacement schedule, > think of what that might mean to say San Francisco, New York or Chicago. I've seen several red LED lamps fail in the same location in a little over a year, each. I'm starting to see green LEDs failing as well. -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge.
From: JosephKK on 21 Apr 2010 01:27
On Mon, 19 Apr 2010 08:52:59 -0500, "mrjb1929" <j.bokelmann(a)n_o_s_p_a_m.n_o_s_p_a_m.comcast.net> wrote: >Thanks everyone for the comments and suggestions. This problem did get >resolved and the Ultra Bright LED's that I was using in my front yard were >causing RF signal's to block the Garage Door Opener Remote from working >properly. I swapped them to the back yard and used some other LED bulbs. >Funny though... These were purchased via eBay but came from a US >Distributor and not overseas, so these were the LAST ones that I suspected >as causing the problem. >Thanks again, >Jerome > >--------------------------------------- >Posted through http://www.Electronics-Related.com Groovy, glad you got it sorted. I just wish that you had come to USENET more directly. It is a really fun and hugely varied place, but it is NOT world wide web. It predates www and cannot really follow www rules having a well developed rule set of its own already. |