How to Calculate the Correct Resistor for LEDs Light Emitting Diodes

  Рет қаралды 371,246

markusfuller

markusfuller

Күн бұрын

This is part of a series of videos about basic electronics. This video shows how to calculate the correct resistor for LEDs using OHMs law. And a few things about parallel and series calculations.

Пікірлер: 501
@sollym4447
@sollym4447 2 күн бұрын
Never have been in any electronics class in my life, you made this very easy. I can say, I just got my first crash course... Thank you sir... I love messing around with electronics, yes did made some messes before, but am still here... 😂😂😂
@Taskuvesku
@Taskuvesku 3 ай бұрын
This is THE BEST tutorial video of this subject! I hope you make more of these! The whiteboard, clearly drawn and written and spoken at a calm pace, the perfect combination! This setup works perfectly for teaching purpose!
@markusallport1276
@markusallport1276 Жыл бұрын
I have struggled for years! trying to figure this stuff out. You single handedly demonstrated this better than anyone, and simple enough where I now understand it. I have been thunking my head over this so many times, but now I did it one last time because it was so easy to do and makes more sense than ever before. Thank you.
@Dave_en
@Dave_en Жыл бұрын
Its simple. Just check the voltage drop of the LED and calculate the resistor value for 10mA current. For indicators even 2 mA current is enough. Even you dont have to be exact, just find nearest value of resistor you calculated.
@donaldhoot7741
@donaldhoot7741 Жыл бұрын
LOL!
@rimmersbryggeri
@rimmersbryggeri 7 ай бұрын
This is like our first physics lesson in 7th grade. My grandpa taught me this when I was about 7 though beacause he was a physics teacher.
@deang5622
@deang5622 7 ай бұрын
Sounds like you are missing the most basic of electronics skills. You should have bought and read a basic electronics book for $10. Then you would have known in an hour or two and not years.
@sudhindrakm
@sudhindrakm 2 күн бұрын
Every other tutorial spoke about avoiding burning up of LED but first time saw tutorial about how to avoid burning up of Resistor. very useful this
@estevanvargas1
@estevanvargas1 2 жыл бұрын
I wish I had a teacher like you in school... you broke it down to bare basics... Great JOB!!!! thank you.
@terrykennedy9799
@terrykennedy9799 4 ай бұрын
Eureka!!! It has sunk in.... I wish I could have grasped this 10 years ago. What a great technique you have for teaching folk like me. Thank you.
@Sanjay-eb6fe
@Sanjay-eb6fe Жыл бұрын
You Sir have a gift to teach stuff with such clarity, plus you've covered the topic in its entirety leaving nothing out. Thank you !
@markusfuller
@markusfuller Жыл бұрын
Thank you very much for your kind comment.
@m.agilnajib345
@m.agilnajib345 3 жыл бұрын
Hey, youre so nice and teaching this as simple as possible and taking it slow... it ecourages me, a commoner, to study this. I always thought I would never get it, but now I actually do. Thank you Sir
@markusfuller
@markusfuller 3 жыл бұрын
Glad I can help. best wishes
@panpaweeel
@panpaweeel Жыл бұрын
I was struggling with this for 3 years... And now I understand everything... You're amazing bro keep your good work 😉
@OldSkoolF
@OldSkoolF Жыл бұрын
Hands down one of the best explanations I've ever seen... thank you brother! SMJ 23
@johnsmith-fz3qk
@johnsmith-fz3qk Жыл бұрын
FINALLY! Someone explaining this clearly. Very much appreciated 🙌
@stephentempest3073
@stephentempest3073 Жыл бұрын
Brilliant. You've actually described this issue simply. Now we understand.!🤔😊 Thank you.
@traviswade7562
@traviswade7562 6 ай бұрын
I would just like to say.....that was the most simple way of explaining the triangle....when I was at trade school doing my electrical apprenticeship...at the start the way this was explained was so SUPER CONFUSING MY HEAD WAS GOING TO EXPLODE...🤯 SO HATS OF TO YOU ON A SIMPLE WAY OF SHOWING A WAY THIS ALL WORKS....I WISH I COULD HAVE BEEN SHOWN THIS BACK IN THE DAY....WELL DONE...👍
@theoutlaw2395
@theoutlaw2395 2 жыл бұрын
Great video. I have a couple small car electrical projects where I wanted to use LED diodes and just didn't know how to properly put them in the circuit. It seemed so difficult to learn, but you broke it down easy to understand.
@Mr.Engine993
@Mr.Engine993 3 ай бұрын
This is the best explanation I've ever found on figuring out a resistor for an LED! Well explained!
@dougtaylor7724
@dougtaylor7724 8 ай бұрын
Mate, you make this process much easier than other videos. Thanks Sir!
@vkirbys
@vkirbys Жыл бұрын
This took me back to my R.A.F. basic electronics training ... great refresher - thank you !!
@alkistsakos6794
@alkistsakos6794 Жыл бұрын
Such a great lecture, so informative and professional thank you kindly!!!
@st.charlesstreet9876
@st.charlesstreet9876 Жыл бұрын
I can’t thank you enough for the math lesson AND lab demonstration. Great Post!
@freewill1114
@freewill1114 Жыл бұрын
Good video. Takes me back to my Signal Corps radio school days; we spent a lot of time calculating circuits using Ohms law. This was years before calculators were available- man, they make electronics SO much easier!
@BuckeyeNut123
@BuckeyeNut123 Жыл бұрын
Ft Gordon?
@FreihEitner
@FreihEitner 6 ай бұрын
Thank you for this. I'm a novice amateur in electronics and had been wondering how to determine what size resistor to use. Your Examples make perfect sense to me.
@garyr7027
@garyr7027 6 ай бұрын
Bought some 5050 SMD LED's for a project and this was valuable information. Never really got into RGB's that much so I'm learning from videos like this. Thanks for the info, you helped me more than you know.
@Rickster5176
@Rickster5176 5 ай бұрын
You, Sir, are a great teacher! You made this very easy to understand and apply. Thank you!
@MrLibra56
@MrLibra56 6 ай бұрын
What a fantastic video. I have been struggling with wondering if I had to add the total Vf for led's in parallel or series. I found your vid by accident and it has saved my sanity. Thank you for uploading it and you are a great teacher.
@tomt9543
@tomt9543 2 жыл бұрын
Very good show for this 62 year old that’s adding some electronics related improvements to his model railway! You are an excellent instructor, and provide tons of information in an easy to comprehend way! Thanks! Subbed!
@markusfuller
@markusfuller 2 жыл бұрын
Thank you very much Tom. If I had more room I would love to build a model railway but there is not enough room to swing a cat where I live. Best wishes
@tomt9543
@tomt9543 2 жыл бұрын
@@markusfuller “Not enough room to swing a cat!” I love it! Ha!
@michaelsmith7425
@michaelsmith7425 Жыл бұрын
Exactly the same reason as I am glad I learned this. Indicator lights for a display panel for my HO railway.
@randyriley3860
@randyriley3860 Жыл бұрын
Very well explained. I truly left with some very interesting and new information. Great job!
@virgiliogervacioestadillo1389
@virgiliogervacioestadillo1389 2 ай бұрын
This simple tutorial really helped me understand how to put some electronic components work together in a circuit adhering the best practices as in my case I am a visual learner. More video like this please.
@jameslarson6555
@jameslarson6555 Жыл бұрын
Thank you for taking the time to make this video, extremely informative.
@DrRSPMD2010
@DrRSPMD2010 Жыл бұрын
Thank you so much for that very clear explanations. I’ve been searching for that for a long time.
@TravisKelleher
@TravisKelleher 8 ай бұрын
Thank you, you've explained everything that I needed to know for a small project I'm working on.
@colindiggle9377
@colindiggle9377 Жыл бұрын
cant thank you enough ive asked and read but couldnt take it in you explain so well that ive finally got it thank you from all our beginners we will get there in the end with teachers as good as you are colinxxx
@patrickcrone7133
@patrickcrone7133 3 ай бұрын
Great tutorial. I had no idea about ohms and resistors. I have learned so much from your video. Thanks.
@smichels5117
@smichels5117 8 ай бұрын
Very fine basic video indeed! Thank you, Markus. Good even for an old hand at this art.
@1cookgs
@1cookgs 7 ай бұрын
Thank you for producing this educational video.
@d.l.harrington4080
@d.l.harrington4080 Жыл бұрын
Vary good video. I learned more from your video on LED circuits then other videos I have watched. I was hoping to see more electronics videos but found they're mostly musical instruments.
@pramodhkailas7074
@pramodhkailas7074 Жыл бұрын
You are a good teacher.. great job keep it up!
@GREMLINS516
@GREMLINS516 7 ай бұрын
First of all english is not my mother language, even that i've fully understood ! Why you was not my teacher 60 years ago?! Thank so much for this clear and fully understandable explanation. Regards from burgundy. ..
@rethabilencheke2338
@rethabilencheke2338 11 ай бұрын
Perfectly explained!!!
@johnlake6321
@johnlake6321 Жыл бұрын
Thanks for your clear explanations.
@mikeZL3XD7029
@mikeZL3XD7029 7 ай бұрын
Nice video, Markus. This is the first one of your videos I've ever seen, keep up the good work!
@turntbyhi-lo3516
@turntbyhi-lo3516 Жыл бұрын
By far, the best hands on demo for this ever. THANK YOU SIR.
@PRR5406
@PRR5406 7 ай бұрын
Splendid, simple instruction. Much appreciated! If I have a higher voltage source, say 12v, will a larger resistor mitigate the potential burn out? Ah! You’re well ahead of me.
@rty1955
@rty1955 7 ай бұрын
Yes. That's the purpose of the resistor. Just perform the calculation for 12v
@gasgiant7122
@gasgiant7122 Жыл бұрын
Great video Mark, thank you👍
@ae00505
@ae00505 7 ай бұрын
Very nicely explained and good making of Video. Thank you sir. I am a novice in this area and I loved the way you explained the entire things.
@Really658
@Really658 7 ай бұрын
Sir all the years in college, and you are the only one I understand.
@breezerm7761
@breezerm7761 6 ай бұрын
Thank you. This is the most wanted basically calculation.
@rc_farmer4866
@rc_farmer4866 10 ай бұрын
That was sooo easy to understand, thank you sir!!
@scottraines7419
@scottraines7419 Жыл бұрын
I really appreciate you making this video. I'm 70 and just now getting into messing around with LED's and breadboards etc. Much of the I R V triangle is still a bit of a puzzle to me and hopefully this old brain will eventually learn to correctly apply the appropriate formulas where needed. I have no idea how far I'll go with this stuff but it's pure fun for now. Thanks again. Scott
@jm9841
@jm9841 Жыл бұрын
Good for you, hmmm, um put your finger over the value you want, so if its V then IxR, if it is if you want Current (I) then it's V over R (V/r or V divided by R) because V is over R. Sorry didn't watch the vid maybe he/she says this. Then you have Watts so P Power (at the peak of the triangle) = I x V. Type in Ohm's Law to your browser then go to images and you should find a wheel image that uses more conventional maths. Stops my brain falling apart like a chocolate orange. You'll get the hang of it. :) Many electronics shops have them as a bookmark. Such as I=√P/R..... Hi from Oz.
@cindylong2782
@cindylong2782 Жыл бұрын
Wow, this was so helpful!! Thank you!
@cristig243
@cristig243 Жыл бұрын
Thank you ! Crystal clear and simple even for a lazy brain like me 🙂
@chriskind
@chriskind 9 ай бұрын
Great explanation. Thank you!
@alanh.4851
@alanh.4851 Жыл бұрын
I just subscribed. Thank you for posting this video. I’m new to electronics and this video will be very helpful for me. I really like your teaching method.
@markusfuller
@markusfuller Жыл бұрын
Thankyou Alan
@InYourDreams-Andia
@InYourDreams-Andia Жыл бұрын
pretty simple right? You explain it very clearly, I now get it in one video. My project can roll now!
@jdcasanasr
@jdcasanasr Жыл бұрын
Thanks man! I always thought the thick part within the LED was always the cathode, until I plugged a yellow LED the other day and went: Uhm... it doesn't work. Turns out I had to connect it "backwards" (the cathode was the thin part in this case). And checking the little cut in the package (thanks to your video) I have now confirmed that was the actual cathode! (I don't tend to rely on the length of the wires).
@atasid9480
@atasid9480 7 ай бұрын
Very nicely explained. Bless you!
@markusfuller
@markusfuller 7 ай бұрын
Thank you
@mootzeroni
@mootzeroni Жыл бұрын
Marvelous. A born instructor.
@fransmurati2370
@fransmurati2370 Жыл бұрын
Simply Briljant and thanks.
@keiths8700
@keiths8700 Жыл бұрын
Nice video, very well done!
@mastercylinder1939
@mastercylinder1939 3 жыл бұрын
Great and very useful video, a whole series of basic electronics, how too videos wouldn’t go amiss. Maybe you could do a step by step, build a synth tutorial. A CS-80 using modern components may seem ambitious, but don’t let that stop you, or something like an SY-1, a mono synth that someone could use multiple example’s of to make a poly synth.
@perryblanchard8353
@perryblanchard8353 Жыл бұрын
Love this video, very informative
@PeterPeer
@PeterPeer Жыл бұрын
Thanks. Very clear! I subscribed!
@AgentKnopf
@AgentKnopf 6 ай бұрын
Very insightful thanks a lot for making this video :) !
@tonypoloney8721
@tonypoloney8721 9 ай бұрын
Excellent. Very helpful thank you.
@regharrelson3499
@regharrelson3499 Жыл бұрын
Beautiful job explaining how to determine resistive voltage drop requirements on how to drive a led. Great job on identifying units in the equations. I think the video could have been better if you explained the equations used to get wattage. Like P=VxI and the other equation variants.
@goodtobeussailing4973
@goodtobeussailing4973 Жыл бұрын
Exactly what I was looking for. Graduated electronics tech course nearly 40 years ago and infrequently used the info. Knew what I was looking for to refresh my memory but couldn't find it till now. A near perfect presentation. Thank you. I recognized the Ohm's law triangle and knew where you were going with the power calculations so I could follow but would have liked to see the P - I - E triangle as well just to be sure I was remembering it all correctly. Also, I was a bit confused at 19 min 41 sec into the video I read "This example would be less efficient than the previous example of running the LEDs in parallel". Wasn't the previous example in series? Sincerely not busting your chops, I just need to be sure because I'm easily confused.
@markusfuller
@markusfuller Жыл бұрын
Hello. firstly thank you for your kind comment, I must rewatch the video and have a look at what I said at 19min41s . I made this video a while ago and cannot remember what I said but I have made mistakes before in other videos so I may be able to add some text on the video to correct any mistake or if not place it in the about section under the video. thanks for pointing this out to me. best wishes.
@deansmith4752
@deansmith4752 Жыл бұрын
There is a typo on the screen. The LEDs are in parallel and each want to take 20mA , whereas the previous series example they were sharing the same 20mA. LED (indeed all diodes) should not be connected in series like this a fraction of a mV difference is all that is needed for ALL the current to go through ONE LED and cause it to very quickly fail (sometimes dramatically). The better solution is to add a limiting resistor in series with each diode and break the relationship. Use the series configuration if you have a lot of voltage and the parallel if you are running from a low voltage. Efficiency of design is also understood by looking at the power wasted by the LED, you obviously want that to be as small as possible
@RexxSchneider
@RexxSchneider 7 ай бұрын
@@deansmith4752 You mean "all diodes should not be connected in _parallel_ like this ..." and that's because whichever diode is taking more current, it will heat up more and its negative temperature coefficient will cause it to draw more of the current, and so on. The power consumed by the LED is fixed for a given brightness, so the efficiency is governed by the power wasted in the dropping resistor (not the LED). To maximise efficiency, you want the supply voltage not too far above the on-voltage of the LED, but that makes the dropping resistor small and can lead to greater variations in current consumed for changes in temperature or variations in samples of the LED.
@arsenic1987
@arsenic1987 6 ай бұрын
@@RexxSchneider I'd say you're both right. To summarize it; a series connection *guarantees* that the same amount of current (A) runs through each LED. A parallel connection of LED's *guarantees* that the same voltage potential is applied across them. LED's are inherently a bit "tricky" in ohm's law, as they don't follow a linear relationship between voltage and current since it's an "active component", being a semiconductor. Since ohm's law doesn't really work on active circuits, we have to use static/idealized values for semiconductors. LEDs, and regular diodes for that matter, are simple enough since when surpassing their forward voltage, (or reverse breakdown voltage), they'll be idealized as essentially having resistance that IS the proportional of voltage and current, and likewise, when below the threshold, we could in a way say the resistance is infinity. But naturally a LED that's ON will heat up, and that's the culprit that makes LEDs so "hard to calculate" with Ohm's law, cause that changes it's forward voltage. The hotter it gets, the lower the forward voltage gets. So dean is correct in that when LEDs are in series, one single LED with different forward voltage would drop less voltage, allowing more current to pass in total, and also leaving more potential for the next LED. It should be noted that the next LED would then sink more total power, decreasing it's forward voltage faster than the first, and kinda "balancing" it out. The solution proposed isn't in effect changing this fact, but does make it look a lot easier to calculate individual LED in a diagram. I think what Dean meant by "current to go through ONE LED" was that one led would drop all the voltage, in effect "consuming all the current", since the current would be the same across all LED's in series what. (disregarding inductance etc.) Rexx is absolutely correct that LEDs shouldn't be connected in parallel, but the "like this" doesn't show in the video, since they all have a limiting resistor. But if the LEDs were indeed in parallel, this is when Dean's comment would happen. One LED would be a fraction out (inevitable) of the forward voltage of the others, thereby making it drop less voltage and in turn let more current flow. This is thermal-runaway waiting to happen, as that LED would consume more power, getting hotter, dropping even less voltage but passing even more current. I wouldn't say that "the power consumed is fixed for a given brightness", since brightness tends to get weaker when over-driven (more power used for heat than for producing photons). But I get the idea. The reason a parallel circuit could be stable a while with very similar LEDs, is that power consumption is equal to voltage times current. A LED is dropping less and less voltage, but taking more and more of the current, making it effectively use close to the same amount of power. But when it drops enough voltage to drag another LED into it's forward voltage threshold, that other LED is drastically affecting the total current in the circuit, since it's basically "turning off" letting all it's current flow through the other LEDs. This is when they'll get over driven and blow. (sometimes dramatically) ^^ So to summarize: use a LED driver to maximize efficiency. It changes voltage in accordance with current drawn, thereby limiting the total current and not exceeding the rating of any LEDs, and use a resistor as a "current limiter" that would account for a certain drop in forward voltage. It's easier, but simplicity has it's tradeoffs. Wow, sorry for the wall of text... I got on a roll there..
@RexxSchneider
@RexxSchneider 6 ай бұрын
@@arsenic1987 You have a decent grasp of what is happening when diodes are connected in parallel, but underestimate the effect of the exponential relationship between voltage and current. When you say, for example, _"A LED is dropping less and less voltage, but taking more and more of the current, making it effectively use close to the same amount of power"_ you miss the point that a forward voltage increase only needs be around 20mV to produce a doubling of the current through it. That's equivalent to as little as 10°C rise in temperature. That means that the power consumed by the diode (or LED) does increase quite dramatically as its temperature increases; the increase in current is is far greater than the minute change in forward voltage. It definitely does not _"effectively use close to the same amount of power"._ The whole point of the dropper resistor is to stabilise the current against changes in temperature since an increase in current as the diode heats up will cause more voltage to be dropped across the resistor, thus reducing the voltage across the diode and significantly reducing the increase in current because of the exponential relationship.
@enriqueemilio8990
@enriqueemilio8990 Жыл бұрын
TOP MAN! THANKS FOR EDUCATING US!!! 👏👏👏👏👏👏👏👏
@patrickguillory-yy2gu
@patrickguillory-yy2gu 7 ай бұрын
So glad I found this guy, he speaks good English 😂❤
@danroberts2055
@danroberts2055 7 ай бұрын
Great Video! helped me a lot!
@studyisfun2979
@studyisfun2979 Жыл бұрын
perfect lecture😍 love from Pakistan🥰
@RonWeeks43
@RonWeeks43 7 ай бұрын
Hi Mark, you should now continue this article for running a LED on ac with higher voltage as well, with and without a rectifier!
@frankjacoby9460
@frankjacoby9460 Жыл бұрын
Very informative 👍🏼
@oldunclemick
@oldunclemick 3 жыл бұрын
Good explanation.
@sweetmaths4213
@sweetmaths4213 6 ай бұрын
Ty you made this so clear
@technomattanbadbollisch1113
@technomattanbadbollisch1113 Жыл бұрын
Great video, Markus. 😃🙏🏼 I specially like the triangle. When I got familiar with that at school I used it at many formulas. 😉👍🏼 I only have one critic to say... Don't put the dot (comma) in the middle of the numbers! Then it can be mistaken for the multiplication sign and is very annoying. 🙈😉
@muddassirsheeraz
@muddassirsheeraz 6 ай бұрын
Awesome Explained thanks
@carolecole1641
@carolecole1641 7 ай бұрын
Fantastic video meny thanks you made it so simple and clear Kind regards Mike 😁😁😁😁
@johnfiorentino5314
@johnfiorentino5314 Жыл бұрын
Nicely explained. Can you please tell be about that circuit board tester you're using & possibly where it can be purchased. Thank You.
@johnramos241
@johnramos241 Жыл бұрын
great work!
@ShaunMcDngh
@ShaunMcDngh Жыл бұрын
Really good tutorial. I like to use a multimeter to find the Anode and the Cathode of a LED. Put your multi-meter in Diode mode. Connect the lead one direction the diode doen't light and the meter will measure "OL". Connect the leads the oppiste direction and the diode lights (a little dim).
@kennmossman8701
@kennmossman8701 9 ай бұрын
that works for some DVMMs
@mmolokikwadiba4777
@mmolokikwadiba4777 Жыл бұрын
You helped me a lot on that one! Liked and subscribed
@markusfuller
@markusfuller Жыл бұрын
Thankyou very much.
@w.j.bendellr.c.flying.1037
@w.j.bendellr.c.flying.1037 Жыл бұрын
Fantastic Job ⭐️⭐️⭐️⭐️⭐️
@computermaster-ik3jy
@computermaster-ik3jy 5 ай бұрын
i learnt more than in did during my 4 years in college in EEE
@toms4123
@toms4123 Жыл бұрын
Very well explained
@rankarahul18
@rankarahul18 Жыл бұрын
Thank you...please make one similar video but for capacitors with two three practical examples
@hominidaetheodosia
@hominidaetheodosia 2 жыл бұрын
Thanks for this Markus, really super helpful :) There is hope yet for my SX-240 flat top LED repair / replacement mod! Now all I need is someone to step me through continuity/Basic troubleshooting on a dead SQ-80 mainboard (yes I eliminated everything eles). He says cheekily probably asking for too much help. Honestly I’d contribute to your patreon if you’d help step me through it.
@TINBED291
@TINBED291 2 жыл бұрын
very good tudor.. Great very good>class.
@markusfuller
@markusfuller 2 жыл бұрын
Thank You Tristan
@Stabby666
@Stabby666 7 ай бұрын
I'll just point out that you should never wire LEDs in parallel with a single resistor. Even the same type, make and batch of LEDs will have variance and so one will conduct more brightly than the others, and thus be taking more of the current. This will inevitably lead to failure, which will then increase the current to the other LEDs (in the case of two LEDs, the remaining one will get double its rated current) and eventually all of them will fail - pretty spectacularly for the last one(s)! To be safe, every LED requires its own resistor to completely negate manufacturing tolerances.
@henrybialik8333
@henrybialik8333 6 ай бұрын
Also he should have stated that the current rating of the LED is the maximum current spec before the LED fails. I usually go for half the rated current value. It will be bright enough.
@jagmarc
@jagmarc 5 ай бұрын
Or a topology compromise somewhere between the two cited extremes
@lawrencejelsma8118
@lawrencejelsma8118 Жыл бұрын
That is important figuring out current across resistors to determine correct power the resistor can handle before getting too hot I sometimes don't check but must! 👍 LED color choices of red, yellow, green and blue ... Interesting to use different color LEDs if for holiday lighting or for color code uses engineering thoughts overlook also.
@christiankleinfeld7635
@christiankleinfeld7635 Жыл бұрын
Funny ... just a week ago I googled for a resistor in 24 V 5 A source and an LED for "power on". I choosed 1 kilo-ohm and it worked. But this here is a much better solution. Maybe that's why the almighty internet has offered me this video.
@_tim
@_tim Жыл бұрын
Interesting video, thank you. Thinking about the parallel placement of the diodes, does that then mean you could take the circuit power supply back down to 5V? It would mean you only need 45 ohms resistance and 0.072w, so a 0.25W resistor would be suitable again, right?
@RexxSchneider
@RexxSchneider 7 ай бұрын
If you place the diodes in parallel, then each one must have its own current limiting resistor. It's fine to use a 5V supply and a 100 ohm 1/4 Watt resistor with each LED.
@Rospajother
@Rospajother Жыл бұрын
Wow great channel
@Gizmopennington
@Gizmopennington Жыл бұрын
Great video...the only thing I would have done different is plug the two LEDs back to back instead or back to front! I looked like the second LED was already on before you plugged in the resistor. I had to watch it a couple times to see that it was actually dimmer before you added the resistor.
@mastercylinder1939
@mastercylinder1939 3 жыл бұрын
Content is king, why don’t you do a step by step build a synth series? A CS-80 using modern components may seem ambitious, but something like an SY-1 would be interesting. Then people could make multiple examples of that mono synth for a poly synth variant. Should give you around two years of content. And then you’d have loads of The Fuller Luv Philtre synths out there. You could also get sponsorship from some parts source outlet where people can get their parts from. A win, win.
@nkelly.9
@nkelly.9 Жыл бұрын
Very good and informative video. I have a question, how can you work out the resistance value if you do not have a spec sheet on the LED? Do you set up a circuit and measure the voltage across the LED and also the amps running through the circuit?
@kennmossman8701
@kennmossman8701 Жыл бұрын
Do you set up a circuit and measure the voltage across the LED - yes
@meneerjansen00
@meneerjansen00 3 жыл бұрын
Thanks. I needed that. ;)
@user-wu3qm7kt6o
@user-wu3qm7kt6o 6 ай бұрын
Thanks a lot for your sharing.
@simpjkee
@simpjkee Ай бұрын
best handwriting on youtube
@MrRenoman2011
@MrRenoman2011 Сағат бұрын
very good video thanks Markus
@geckoproductions4128
@geckoproductions4128 Жыл бұрын
Nicely done
@GregSr
@GregSr 5 ай бұрын
I went through an Air Force tech school back in 1976. I understand everything you explained. Well done. But, I've gotten a little rusty over the years. One day I got a phone call from my son who worked at Circuit City as an installer of various electronics. He had a question which made me re-think a simple series circuit. He had an LED that runs on 5 volts that he needed to install into the 12 volt car. That meant he needed to drop 7 volts across a series resistor. However, we were lacking the important information about current. He looked on the packaging of the diode and it provided the specific milliamps needed. That allowed me to determine the correct resistance to put in series with the LED. While we were still on the phone, he hooked up the circuit. Bingo! LED was on and nothing was burning. It felt good to know that my brain can still work through simple electronics when necessary.
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