LED voltage, current, output relationships
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- Опубліковано 5 жов 2024
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LED voltage, current, output relationships
In this video we look at how LEDs work, and the relationships between voltage, current and light output.
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FAQ:
Me: Paul, 49 from USA
Education: United States Navy, University of California at San Diego B.S. E.E., University of Pittsburgh M.S. E.E.
Experience: United States Navy STS, Bayer Intnl Process Engineer
Current: Teaching college freshmen electrical engineering at a small community college in the Pittsburgh Area.
Health: BAD (Congestive Heart Failure)
Hobbies: Electronics, flying, amateur radio, music (classic rock)
Really like your style. Casual and informative.
LEDs are great fun to watch go pop. But like you say not recommended. I've blown a few unintentionally so I dug around and found a pretty comprehensive chart on frequency, color, forward voltage and current. Stopped me from wasting anymore LEDs. I like your graphs they really help to visualize what is happening. Thanks for the good show!
I enjoy your videos so much, back to basics with common sense, down to earth explanations. If you havd time would love to see more like this. Think sometimes think that the experts in electronic who wstch your channel forget to appreciate that newbies need tutorials like these. Thank you again for your time and effort in producing these videos. Regards J
Thank you, there will be be more
Just letting you know that i enjoyed this video very much. Thank you .
me too
I knew that years ago, but I had mostly forgotten it. Thanks for the great reminder!!
Welcome
Another great video , Just like to mention when playing with a joule thief i thought i had found something only to find out my led's i was using worked bright on a single new 1.5/6v battery. Keep up good work
Really great.Thank you! Do you have a video on serial LED vs parallel?
ua-cam.com/video/mKCAxwjfs0I/v-deo.html
Thank you for doing this video! Can you please do a video with series versus parallel wiring of LEDs?
Yeah, what do you want to see?
learnelectronics if i have X number of LEDS, ____ would be the best way to wire it up. I tried 4 LEDs in series and nothing happened (i think the voltage wasn't high enough). Explain and talk about constant current vs constant voltage method of lighting LEDs.
Ok, got it.
Tomorrow's video is for you.
Great info, Thanks!
How can you test the "response time" of lamps and LEDS? can you make a video lesson on that and does the output power wattage of lamps and LEDS how it affects them with LDR's. Because the response time of the lamp will affect the LDR's curve but why?
What about the different shades of green LEDs you get. I can't seem to find this really nice bright authentic green color LED. I want to know more anout this LED so I can buy that type only. Most green LEDs are a green/yellow color and are dim at 2V.
Nice and simple, basic explanation. Can you make some kind of proximity sensor with IR Leds? Cant understand freq. operation :( bought couple of them (reciver and emiter) + lm3.. comparator getting nowhere with youtube videos on subject. You can buy finished product for arduino line folowing robot but sensitivity is like 5-15 mm, nothing bout 50 cm or more? Tnx, you channel is my daily dose of electronisc :)
Thanks. You could do it with it LEDs, but they don't really have great coverage at a distance. Two much better ways to do it are with an ultrasonic sensor and the ping library or a laser TOF sensor.
Done those 2 :) wanna learn it how to do it without MCU. I`m guessing its something about IR LEDs must be on same freq. not really in to basic electronics.
I didn't know that...thanks!
thank you
Thumbs up; but i have a question : i drove a led with current limitation at 20mA, i saw that the led continue to run at 25 volt, so what ?? no limitation of voltage ?
If you limited current, it did not get to 25V. A red led current limited at 30mA will only pull 1.9V.
Paul, my led's say they are all are 5MM...And, they are all different colors
Thumbs up 👍
does that 15-30 range apply to all leds? specifically for radio control models I am talking about, some come in things like bumpers already installed, some may be smd type, but generally speaking, leds need to be within that current range? I mean, I had no intention of driving them harder than 20ma, but I was worried 20 may be too high for some? p.s. for clarity, if you cannot already tell, i know nothing about leds/electronics, i am building my first rc with many leds added so genuinely asking
No you need data on each one, but if you never go above 20ma you should be safe. This does not apply to 1W or more LEDs.
@@learnelectronics awesome thank you sir for your reply and help
Good information video Paul, just no love for Blue LEDs. (Joking)
didnt know that wavelengths dictate the voltage :O
Wavelength and the chems used for doping
Any Indian for neet syllabus😅😅
out of focus