On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org wrote:>Also Lumex SSL-LX5093GGD: >https://www.lumex.com/C060207P04.html#start >(see Bipolar section) > >Only stock is at Heilind: >https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.htmlThanks, but the above Lumex LED is 5mm and I need 3mm. It's to replace the green LED in this relay: <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
Need same color bi-directional LED 3mm
Started by ●October 24, 2018
Reply by ●October 29, 20182018-10-29
Reply by ●October 30, 20182018-10-30
On Monday, October 29, 2018 at 10:51:27 PM UTC-4, Jeff Liebermann wrote:> On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org > wrote: > > >Also Lumex SSL-LX5093GGD: > >https://www.lumex.com/C060207P04.html#start > >(see Bipolar section) > > > >Only stock is at Heilind: > >https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.html > > Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to > replace the green LED in this relay: > <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg>Ok, here is your part, T-1, 3mm, green, bi-polar. https://www.kingbrightusa.com/product.asp?catalog_name=LED&product_id=WP937GGD You can get samples from Kingsbright or buy then from Digikey or Mouser from stock. https://www.digikey.com/products/en?lang=en&site=US&keywords=WP937GGD Seems you were looking at the international web page where they use a different part number for some reason. On the US page they list the above part number WP937GGD. They don't say this is a bi-polar or even bidirectional part in the data sheet. You have to notice the schematic symbol. I expect this is why Digikey and Mouser don't list them that way, rather as "conventional". Goofy. Rick C.
Reply by ●October 30, 20182018-10-30
SunLED has a family of Bi-Polar (two-lead) 3mm LEDs, including Green/Green: https://www.sunledusa.com/productSeries.aspx?ser=XLxxxx37x Octopart claims to know the part numbers, but no distributors found. Since you have some time, you could ask SunLED whether these are vaporware or just stocked in strange places. -- sceptre@sdf.org SDF Public Access UNIX System - http://sdf.org
Reply by ●October 30, 20182018-10-30
On Monday, 29 October 2018 22:51:27 UTC-4, Jeff Liebermann wrote:> On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org > wrote: > > >Also Lumex SSL-LX5093GGD: > >https://www.lumex.com/C060207P04.html#start > >(see Bipolar section) > > > >Only stock is at Heilind: > >https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.html > > Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to > replace the green LED in this relay: > <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> >(perhaps) interestingly, bipolar same-color LEDs seem to be pretty available off the shelf in China, in smallish quantities (eg. a bag of 1K). For example, diffuse blue-blue 3mm. Maybe nobody wants to bother exporting them for onesy-twosy customers who come along once in a 蓝色 moon. --sp
Reply by ●October 30, 20182018-10-30
On Monday, October 29, 2018 at 11:59:04 PM UTC-4, gnuarm.del...@gmail.com wrote:> On Monday, October 29, 2018 at 10:51:27 PM UTC-4, Jeff Liebermann wrote: > > On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org > > wrote: > > > > >Also Lumex SSL-LX5093GGD: > > >https://www.lumex.com/C060207P04.html#start > > >(see Bipolar section) > > > > > >Only stock is at Heilind: > > >https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.html > > > > Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to > > replace the green LED in this relay: > > <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> > > Ok, here is your part, T-1, 3mm, green, bi-polar. > > https://www.kingbrightusa.com/product.asp?catalog_name=LED&product_id=WP937GGD > > You can get samples from Kingsbright or buy then from Digikey or Mouser from stock. > > https://www.digikey.com/products/en?lang=en&site=US&keywords=WP937GGD > > Seems you were looking at the international web page where they use a different part number for some reason. On the US page they list the above part number WP937GGD. > > They don't say this is a bi-polar or even bidirectional part in the data sheet. You have to notice the schematic symbol. I expect this is why Digikey and Mouser don't list them that way, rather as "conventional". Goofy. > > Rick C.I filed a correction request with Digi-key and they notified me the listing has been corrected to be displayed on the next website update. :) Now how many other such LEDs are mislabeled on the website because the maker doesn't list them as bi-polar or bi-color? Rick C.
Reply by ●October 30, 20182018-10-30
On 2018-10-30 14:24, speff wrote:> On Monday, 29 October 2018 22:51:27 UTC-4, Jeff Liebermann wrote: >> On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org >> wrote: >> >>> Also Lumex SSL-LX5093GGD: >>> https://www.lumex.com/C060207P04.html#start (see Bipolar >>> section) >>> >>> Only stock is at Heilind: >>> https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.html >> >> >>> >>>Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to>> replace the green LED in this relay: >> <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> >> > > (perhaps) interestingly, bipolar same-color LEDs seem to be pretty > available off the shelf in China, in smallish quantities (eg. a bag > of 1K). For example, diffuse blue-blue 3mm. Maybe nobody wants to > bother exporting them for onesy-twosy customers who come along once > in a 蓝色 moon.Most likely they are built there by the *illion and put into household goods in large quantities as mains power indicators instead of the old neon glowlamps. A bidirectional same color led with a resistor is probably the cheapest mains indicator you can make that would not be actively irritating. Anything less means using a single polarity led, and that flickers so ghastly that even the most insensitive customers will complain. Also, it loses brightness quickly because of reverse voltage breakdown every other mains cycle.
Reply by ●October 30, 20182018-10-30
On Tuesday, 30 October 2018 13:24:29 UTC, speff wrote:> On Monday, 29 October 2018 22:51:27 UTC-4, Jeff Liebermann wrote: > > On Tue, 30 Oct 2018 02:16:22 +0000 (UTC), sceptre@sdf.lonestar.org > > wrote: > > > > >Also Lumex SSL-LX5093GGD: > > >https://www.lumex.com/C060207P04.html#start > > >(see Bipolar section) > > > > > >Only stock is at Heilind: > > >https://estore.heilind.com/SSL%2DLX5093GGD/LMXSSL%2DLX5093GGD.html > > > > Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to > > replace the green LED in this relay: > > <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> > > > > (perhaps) interestingly, bipolar same-color LEDs seem to be pretty available off the shelf in China, in smallish quantities (eg. a bag of 1K). For example, diffuse blue-blue 3mm. Maybe nobody wants to bother exporting them for onesy-twosy customers who come along once in a 蓝色 moon. > > --spI was just thinking if you can't get em here, maybe time to look at some of the less trusted foreign suppliers. I'd also be very tempted to just stick a couple of sm leds in there back to back. The white plastic should distribute the light passably well. NT
Reply by ●October 31, 20182018-10-31
On 28/10/18 4:05 am, Jeff Liebermann wrote:> On 24 Oct 2018 17:15:19 -0700, Winfield Hill > <hill@rowland.harvard.edu> wrote: > >> Jeff Liebermann wrote... >>> >>> Is there such a thing as a bi-directional LED where each >>> polarity is the same color? >> >> https://www.manufacturer.lighting/info/64/ > >> AC LEDs, with two sets of back-to-back LEDs, are available >> for high-voltage high-light-level LED assemblies. For low >> light levels running from AC, people just use a back diode >> and run the LED half-cycle at 60, etc., rather than 120Hz. > > Thanks. Sorry for the delayed reply. > > All the "AC LED" hints under the above description seem to be > 117/220VAC powered and seem to refer to much larger light bulbs and > strips. > > There's very little room for a diode bridge or a 2nd LED. The only > way I could make that happen is to redesign and 3D print a new white > plastic LED frame. The plastic is there to provide voltage isolation > between the solenoid wires and the relay contacts and frame: > <http://www.learnbydestroying.com/jeffl/crud/Omron%20relay.jpg> > I could cram a small SMD bridge along the side of the relay but would > require precision soldering under a microscope, and is too much work. > Similarly, I tried to replace the 3mm LED with two parallel SMD LED's. > It worked, but again required too much work. The typical 20 degree > viewing angle was also too small. > > Your suggestion of searching for an AC LED > <https://www.google.com/search?q=%22AC+LED%22+3mm+green> > found only one available product that is green in both directions and > is exactly what I'm looking for: > <https://www.rapidonline.com/pdf/56-2308.pdf> > Ebay has some in the UK: > <https://www.ebay.com/itm/TruOpto-OSGGD23131E-3mm-Pure-Green-Ac-LED-10000MCD-30/132604396903> > $3.50/ea plus shipping from UK is rather expensive. The best I could > do is $0.125/ea plus VAT and shipping from UK: > <https://www.rapidonline.com/truopto-osggd23131e-3mm-pure-green-ac-led-10000mcd-30--56-2308> > However, they only have 18 in stock and do not plan to order more. > > So, I decided to take the easy way out and simply order some bi-color > 3mm LED's and deal with the inevitable confusion when it arrives. > <https://www.ebay.com/itm/121748773460> > $9/100 pcs. > > >RGB LED? https://www.amazon.com/3mm-rgb-led/s?page=1&rh=i%3Aaps%2Ck%3A3mm%20rgb%20led Robert Martin
Reply by ●November 1, 20182018-11-01
On Thu, 1 Nov 2018 11:28:43 +1100, Robert Martin <rmartin@bristol.edu> wrote:>RGB LED? >https://www.amazon.com/3mm-rgb-led/s?page=1&rh=i%3Aaps%2Ck%3A3mm%20rgb%20led >Robert MartinThanks, but no. It won't work. Same problem as a bi-color LED. There's no easy way for it to EASILY fit into the relay enclosure, operate on 24VDC with any polarity, and always show green, without adding additional diodes and resistors. Several people were nice enough to find LED's that will work without additional parts. However, they're difficult to find in the US, making this a procurement exercise, instead of an engineering challenge. I'm now waiting for some parts to arrive. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
Reply by ●November 1, 20182018-11-01
On Thursday, November 1, 2018 at 12:52:09 AM UTC-4, Jeff Liebermann wrote:> On Thu, 1 Nov 2018 11:28:43 +1100, Robert Martin <rmartin@bristol.edu> > wrote: > > >RGB LED? > >https://www.amazon.com/3mm-rgb-led/s?page=1&rh=i%3Aaps%2Ck%3A3mm%20rgb%20led > >Robert Martin > > Thanks, but no. It won't work. Same problem as a bi-color LED. > There's no easy way for it to EASILY fit into the relay enclosure, > operate on 24VDC with any polarity, and always show green, without > adding additional diodes and resistors. Several people were nice > enough to find LED's that will work without additional parts. However, > they're difficult to find in the US, making this a procurement > exercise, instead of an engineering challenge. I'm now waiting for > some parts to arrive.Digikey isn't easy enough? Stock, $21.26 for 100 plus postage. Rick C.
