Servo Type Connectors and 3mm UV LED's
FlyingFishFinger
Posts: 461
Hi!
What are the servo-type connectors called and where could I find them? I'd like to have a couple of servo ports on the board I'm making, and I also need some sort of connectors for my GP2D12 sensors...I thought I might use the same ones (Both plug and sockets...). I checked DigiKey, but they have so many connector types that I'm completely lost on that.
Also, do 3mm UV LED's exist? I can't seem to find any at all...Digikey only has 5mm ones, as does every other place I've checked.
Thanks for any advice
Rafael
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
What are the servo-type connectors called and where could I find them? I'd like to have a couple of servo ports on the board I'm making, and I also need some sort of connectors for my GP2D12 sensors...I thought I might use the same ones (Both plug and sockets...). I checked DigiKey, but they have so many connector types that I'm completely lost on that.
Also, do 3mm UV LED's exist? I can't seem to find any at all...Digikey only has 5mm ones, as does every other place I've checked.
Thanks for any advice
Rafael
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
Comments
For male connectors on a board, you can merely use 3 pins.
For female connectors, I located some black plastic ones that work with my R/C aircraft reciever, but are not the exact duplicate of a 'servo connector' which has a tab on one side to avoid mistaken plug ins.
The point is, if you want to get real servo connectors, they are more expensive and might be gotten thru Radio Controlled Aircraft suppliers and vendors.
UV Leds? You might try MOUSER. But it might be that the output of a 3mm LED isn't enough in the small package. Maybe no market. Are you sure you mean UV. LEDs seem to have done best in the IR range.
I am wondering if some CD players or burners use a UV led. In that case, salvage might provide them.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"If you want more fiber, eat the package.· Not enough?· Eat the manual."········
You crimp your wires onto little pins or sockets, then insert them into the black plastic housing. You don't actually have to use crimpers, you can just use needlenose pliers and then solder them if you want.
Here is a post where I made a similar connector:
http://forums.parallax.com/forums/default.aspx?f=15&m=116356
http://forums.parallax.com/showthread.php?p=577638
of suppliers. Keep in mind that the deeper into the UV you go (< 390nm) the more you're going
to pay and the more harm these LEDs can do to your eyes! Shortwave UV, like those in "US Dollar
bill checkers", aren't intended to be looked at. Please be careful!
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
-Rusty-
--
Rusty Haddock = KD4WLZ = rusty@fe2o3.lonestar.org
**Out yonder in the Van Alstyne (TX) Metropolitan Area**
Microsoft is to software what McDonalds is to gourmet cooking
I don't know where you're getting your information, but all proper US currency checkers of which I'm aware use LONG WAVE UV-A (~270-320nm) ultraviolet frequencies. Those which claim to use "two bulbs" are only taking your money.
Only UV in the SHORT WAVE UV-B (~150-300nm) regions can be extremely harmful to humans. UV-A can be harmful over time, but not to the extent of the short-term effects of UV-B.
Here is a health oriented piece from the NASA web site that you may find enlightening:
http://www.nas.nasa.gov/About/Education/Ozone/radiation.html
Generally speaking, when you reference optical UV sources, only UV radiation which also produces ozone is harmful to humans. That only occurs in the UV-B region. Any such producer of ozone MUST be so labelled here in the United States by law, as ozone is a known carcinogen, and can cause permanent genetic damage!
Another common source of harmful UV-B radiation is an operating welder. The potential damage here is to the human eye, even at a distance, as with other UV-B sources. The condition is medically know as Ultraviolet Keratopathy, or "Welder's Burn".
Regards,
Bruce Bates
former G.E., Sylvania/Osram, and Westinghouse
Large Lamp Lamp Distributor for 20+ years
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
Rafael
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
While a lot of that information is fine and good, it still shouldn't lessen
my warning about looking into UV LEDs. If you've purchased any of late,
they are have at least one warning label on them against doing do; at
least from reputable dealers.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
-Rusty-
--
Rusty Haddock = KD4WLZ = rusty@fe2o3.lonestar.org
**Out yonder in the Van Alstyne (TX) Metropolitan Area**
Microsoft is to software what McDonalds is to gourmet cooking
I'd LOVE to see the warnings, where did you purchase them?
Regards,
Bruce Bates
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
Your best bet would be to use a Purple-X filter to remove the visible light. I know of no other way to do it, and I've used blacklight for many applications quite successfully by using such a filter.
The big advantage you may have is that there is very little heat from an LED, and thus you may be able to get away with something like a Roscoe gel (more like "cellophane") as opposed to the tempered glass filters I had to use at $50.00 apiece.
Regards,
Bruce Bates
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
http://www.goldmine-elec-products.com/prodinfo.asp?number=G15221
Here is the Handy Get web site (per the Electronic Goldmine link), and there is no such LED listed that I can find, so I guess we're stuck on this one.
http://www.handyget.com/
My best guess is that warning was included by yet another mis-informed·person unfamiliar with the difference between UV-A and UV-B. It's unfortunately a very common error. The only thing that bothers me about superfluous warnings is the unfortunate "crying wolf" effect.
I will say this however, after about 2 hours of researching various manufacturers of UV LED's. They generally seem to include a UV warning for any UV LED's with peak wavelengths in the range of ~255-310 nm. Those are all in the normal range of UV-B and "push" the UV-A range at 300-310. I certainly have no qualms with that.
At ~315-340 nm the UV warnings cease and visible violet is deemed to start at ~400 nm. That too makes good sense, as 315-320 is at the high end of the UV-A range.
Where the communications gap lies, is beyond me, as the manufacturer's datasheets are 100% on the money, just as one would expect them to be.
Regards,
Bruce Bates
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
Post Edited (Bruce Bates) : 7/5/2006 6:36:57 AM GMT
to sign a waiver and faxing that to Nichia prior to ordering. See here and here.
Again, Nichia's product spec sheet for one of their units includes warnings about not looking directly into a UV LED. See section 7 entitled "Cautions".
And while it's not a "professional" site, the LED Museum has a lot of good information.
I like the part at the top of the page for UV LED's. Maybe the guy doesn't know what
he's talking about but.... better safe than sorry.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
-Rusty-
--
Rusty Haddock = KD4WLZ = rusty@fe2o3.lonestar.org
**Out yonder in the Van Alstyne (TX) Metropolitan Area**
Microsoft is to software what McDonalds is to gourmet cooking
Post Edited (Fe2o3Fish) : 7/5/2006 6:37:46 AM GMT
Please show me a "short wavelength LED" from "Nichia, probably the World LEADER" as you propose. I can only find LONGWAVE UV LED's on their web site. The data sheet link which you have provided is for a LONGWAVE UV LED with a peak wavelength of 375 nm. 375 nm is so LONG it's right near the visible violet range at 400 nm!
Based on this last posting, and other things you've mentioned, I'm wondering if you're not confusing the terms longwave and shortwave (regarding light frequencies) and something else perhaps in your radio amateur world. Here are the appropriate frequencies for longwave and shortwave UV:
UV-A longwave ~270-320 nm
UV-B shortwave ~150-300 nm
As regards the LED Museum, it's an interesting web site, and I occasion it often, mostly to find out what's new in the LED world. Unfortunately it doesn't always contain accurate information, and a good deal of it is outdated. In fact, if you look at the dates on many of the notes, many are 10 years old. Like all "personal web sites" take what you read there with a grain of salt. If you'd prefer to believe the LED Museum over NASA, be my guest.
Regards,
Bruce Bates
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
I did not say short wavelength UV, just short wavelength -- as in shorter wavelength
that the early red LEDs. Certainly, as compared to visible light, UV LEDs emit a shorter wavelength.
Also, I'm not believing the LED Museum over NASA, unless NASA's wrong (it's happened!) or has
been "misinterpreted". One study or paper doesn't make NASA, or anyone else, right. Just call off
the dogs! I just wanted to make sure someone didn't mess up their eyes by looking at/into a
UV source. If UV LED's don't hurt... well, maybe so, but it certainly doesn't hurt ONE IOTA
to not look at the UV source. Enuf said!
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
-Rusty-
--
Rusty Haddock = KD4WLZ = rusty@fe2o3.lonestar.org
**Out yonder in the Van Alstyne (TX) Metropolitan Area**
Microsoft is to software what McDonalds is to gourmet cooking