Bill, thank you for the time that you but into your instruction I find it awesome and I am learning from you and having fun at the same time. Please keep the channel going you are teaching so many.
Thank you for the comprehensive article on your blog. I had already seen the video, but the detail in the article truly imparts a level of understanding that a RU-vid video never could (and possibly wouldn't be appropriate in that format anyway). In particular thank you for the explanation of Arduino's analog reference. I probably would utilize the SI1145 for UV sensing but I can think of many circumstances were the analog reference information would be a boon when the source being measured was low voltage.
I've always wondered how you are able to record the whole sections where you talk to the camera is a single take. I'm guessing it's a combo of a teleprompter, great scripting, knowing your material and simply being awesome. Really enjoy your very detailed videos! Thanks for sharing your knowledge.
Hey Bill, you need to update the links in the description to your new web pages. I enjoyed your video very much thank you. I will probably build this project as I'm working with UV and IR leds.
Thanks for the great video! I'm interested in air quality / gas emission sensor usage with Arduino. I thought this would be a good topic for a video presented by you 😊 Cheers from Canada!
You really do an excellent job of explaining things and I do appreciate your efforts in the production of your videos. However, I am still waiting for those "I will be exploring that in a future video" videos.
I'll try this. I live in tropical Far North Queensland, Australia; today's UV index is 12, despite the spring subsolar point being over 2 months in the future. It will be interesting to see what accuracy I get at the higher end of the range.
Sorry for the delay with which I watched this video, I did not have the necessary conditions to give you all the attention it deserves. Great video as always: you are clear in explanations and understandable in speaking. despite being Italian, I almost do not need to use subtitles (although I still activate them as "parachutes") Congratulations. One thing came to my mind: maybe it works maybe not: if you put a display 16 for 4 and in the settings write 16,3 or 16,5 do you get a line scroll? or just a complete malfunction? P.S. I can not register ... I already registered a few months ago :-)
Hello Bill! Thank you for your nice, funny and informative Videos! I always enjoy to watch your Vlog! From the standpoint of an long-time Lightingdesigner for shows, it is right on the spot what you are telling us about light! My Question is: You print out a value for visible light. Does the measurement outputs in Lux (lx)? Since 1lx equals 1 Lumens per square-meter, the value (268) lux... ahm... looks like it is actually lux. 268lx is in fact a near perfect value for workspaces. In middle Europe, the norm-value for architectural lighting in offices is 300lx for writing tables. So, lx in real life is a intensity-to-areal-measurement! If it really outputs lx, then wow! A professional lx-meter is very expansive! Ask me... ;) Thank you again and keep it up! Can't wait for a new inspiration from you! At the moment, I am working on a radar system in W-Band for supersonic speed measurements up to a distance of 200 m (~220yards). Logging temperature, humidity, current speed of sound (temp&humid correlation (thank's for that)) and other parameters. So if you wish to get my approach to this, feel free to contact me via email! You should have it, since I subscribed to your newsletter. My youtube name is my real name, so you can find me at your mailinglist!
Suggested correction: Most people can see some UVA, but the sensitivity of the human eye is much lower than the "normal" light range. Thus the only time most people can see UVA is in a dark room where UVA is the main light source. Some people, like myself, have abnormal eye sight and can see UVB, again at much lower sensitivity. In my case the trade off is the loss of part of the red spectrum. There are some people that can see IR.
Big fan of your professional Videos !! Thanks I'm interested in measuring water velocity in a natural stream, are you familiar with a component / Arduino setup that would help out? any related video?
29:10 Earlier you mentioned that the SI1145 uses IR and Visible light to calculate the UV. When your using the LEDs at 29:10, what is causing the much higher readings? Is the visible portion of the ~400nm LED bright enough to create these readings, or is the concept of "visible light" a bit more fluid than intuition may imply? Perhaps an explanation of why I'm asking would clarify. I am experimenting with dry film photoresist. Unfortunately I was ignorant of the specificity of UV wavelengths called for with most UV sensitive media. I went to the trouble of building a small UV led light using ×84, ~400nm LEDs. Shortly thereafter I discovered the 365-370nm specification. I did a few transparency exposures with the light and discovered that it does infact activate the film. Due to other factors in dialing in my process I switched to using direct sunlight on cloudless days between 12pm and 4pm with an exposure timer in order to get slightly more consistent results with a known broad spectrum UV source. I live just off the west coast of the US, South of Los Angeles so a clear day involves fairly consistent atmospheric conditions day to day. In the future, after I completely dial in my chemistry and process, I'm interested in characterizing the differences between a solar exposure versus a ~400mn UV LED exposure. I want to do these experiments before rejecting my completed light project entirely and building another. I would rather source a sensor to measure and qualify my results instead of just maintaining a subjective log with products and findings. This task does not seem well suited to a sensor that is designed to indirectly calculate UV light, however your demonstration at 29:10 causes me to question that assumption. Do you have any thoughts or suggestions regarding my future experiment? It's on my list of things to get to eventually but I haven't explored sensors or techniques much at all yet. During your research for this upload, have you noticed any other sensors I should look into for sensing light of a more specific wavelength? Also I'm not exactly sure of the science behind the wavelength specificity of both UV LEDs or UV sensitive dry film photoresist. I don't know if you have any insights here or any references I might be able to look into for more information. I haven't found very many reliable sources for this application. Most sources are quite subjective in nature. Thanks for the upload. -Jake
Excellent video tutorial. By the way, what kinds of materials can be used to protect the face and arms and legs from the daily uv from the sun? Thank you.
Do any of these sensors or any other sensors around would be capable of measuring Luminescence too? As in marking a wooden ruler with UV ink for example and then passing it under the sensor with uv light which will cause the uv markings to release photons everytime it hits an index mark? Thanks very much.
Great videos! Please suggest where to buy a few UV LEDs for emitting UVA and UVB. And also IR emitting LEDs. I found some options on Amazon, but they are selling in bulk. Thank you so much.
I am hoping you can answer my question, I coded my own wind speed and direction sensors which are totally analog, Can I add tehm to an existing I2C dominant program with no hiccups or is it impossible? Hoping you reply to this as I cant find that info anywhere else, thank you.
Please note that the Arduino Mega does not have internal analog reference voltages. I got bitten by this and it took a while to figure out why I was not getting valid readings with a Mega. You must use the AREF pin and the command to use that as a reference.
hello , but how can you recognize with this sensor if the person is outside or inside, because i saw that you have index 5 with light and this is not correct, la UV only can be present outside under the sun not inside door
I was wondering if there is any way to detect the intensity of just the UVB range. I am a little baffled by the UV scale. It would seem quite inaccurate not seperating the UVA and UVB. It is my understanding that the UVA intensity is fairly constant throughout most of the day while the UVB intensity is mostly during the mid day. Also it is my understanding that most of the UVB rays are gone for basically of 8 months of the year for most of the USA. I personally would like to quantify the UVB intensity throughout the day, throughout the years for the Vitamin D and serotonin production.
Dear Sir, I tried to measure if my LED flashlight on my IPhone emit some UV and I used cheap UV meter and I put flashlight very close to sensor and It read number 11. I would ask You if it is possible to explain me this. Is it depends on type sensor an it read only IR radiation and “fooled” sensor? Or what happened exactly? I am afraid cos I used my flashlight on daily basis.
hii my code says the term "Positive" is not declared in in the liquidcrystal lcd.... what should i do now. i couldnot install the newliquidcrystal library as the link given leads to an page error
I wonder what UV is being put out from those, "bad batch from the vendor", violet colored street lights throughout the states. Cities/county's have claimed, defective bulbs, a class action against the vendor etc, but.......as far as here in South texas, by & large, they are not relamping those, "defective", lights with properly working bulbs. We're talking major intersections, too.....you know, where safety is key?
Hi there, I am trying to make the UV meter with the LCD screen at 29:56, however I am getting an error message in my code. Did you modify one of the header files to define 'POSITIVE'? Thanks so much and your video has been very helpful!!
How do the libraries know the I2C addresses of the two sensors? If most devices are using 7 bit addressing and there are 112 possible slaves and the I2C commitee assigns a device ID, then there can only exist 112 possible device classes worldwide! I don't believe that. Also, how would you connect two sensors of the same class to an I2C bus if they share the same address? This would be not possible. BTW, aren't the words Master/Slave forbidden now because of this BlackLivesMatter thing?
Ugh... The title says Arduino UV Index Meter. It does NOT say "what is ultraviolet?". Nor does it say, "How UV is used" or "Types of UV lamps" OR "experiments with UV". If you're going to do FIFTEEN minutes on other things, PLEASE tell us in advance and provide a "Get to it already!" link.
