I don't know how to thank you. I was so confused that I was almost ready to give up. Your video really explained the concept very well that I wanted to know so badly. Thank you so much 🥰
I have looked everywhere to have this explained to me - absolutely brilliant. Thank you ! I just couldn't understand how a LDR could turn a nightlight on, since in low light the resistance is high. Only doing GCSE Physicis (trilology), but there was a 6 mark question at the end and I was really struggling with. Thank you so so much.
Literally the best piece of work I encountered regarding the topic.......none of my text book or any other platform on internet served as I require......the only video I found to enlighten my concept and spark magnificent learning And understanding Fully contented
I was so confused how the ldr worked when the resistance is high if it’s dark. This video just made me understand it 100%. Best explanation on the internet. Thanks
you helped me a million fold with this, thank you for explaining so easy to comprehend, and now my mother in law who.lives in the jungle of mexico will have a solar light and won't have to flick a switch, thank you may god bless you and keep blessing you
Thank you for the explanation. I had a power line crew running secondaries to streetlights. I asked them if they isolated the feed and they said it didn't matter because the photocell isolated the power from one streetlight to another. Your video explained to me how wrong they were and the potential for injury was real.
Read through Wikipedia, watched multiple TH-cam videos, and it wasn't until I watched your video that I finally understood what photoresistors are and what they do. Either I'm really stupid or you are a good teacher. Thanks!
i finally understand why a lamp at night turns on when the resistance of the LDR is high- essentially the flow prefers flowing through the lamp as there is less resistance. Likewise, during the daytime when the LDR's resistor is low, the current mostly flows through the main part of the circuit, not the parallel bit. The lamp could have a slightly higher resistance than LDR
Thanks a Lottt. I was getting so confused while writing the working, that if the resistance is high there is no current flow so that should have meant the streetlights would not turn on in the dark...
Perfectly explained, I was literally thinking about the logic of why is resistance increased at night when clearly current will be less, but now I understand so thanks for that. But just wondering is there an easier way than this to turn street lights on because this method is a sort of reverse psychology kind of method, isnt there a faster method where amount of amps is regulated to low/high staright away and doesn't need an ldr in a circuit?
As you accept ,'its not very efficient', but the basic theory of LDR & how it works has very nicely been explained, just like a professor explains in the classroom on a black board. Keep it up, Mortimer123. Very useful for the students.
How much I had to search to eventually understand how LDR is used to control lights. Such a simple explanation! Everywhere you look you find the same thing, resistance of LDR increases as the intensity of light decreases and vice versa but how does that explain the use of LDR in controlling lights? I just understood without even watching the whole video. Thanks
Well there is the secret I have been missing, what every electrician needs, a big metal bracelet to dangle over your circuit board. Anyway great video I gave a thumbs up
but this would mean that you'll always be drawing 120w (based on your numbers) regardless whether the light is on or off right? is it possible to use a mosfet here? would be jice if you can provide an example
to help control the current that is flowing to the bulb, the fixed resistor is for the bulb, not the LDR, u need it there otherwise the bulb will burn out as most battery will produce a lot more power than a bulb can handle.
Mr Lall, A serial setup is not useless. If you connect a solar battery charger to a battery, you would want current to flow through the circuit when the solar panel is in the sun (or daylight). But you do not want current to flow when the voltage generated by the solar panel is too low (or zero) to charge the battery because the solar panel is not generating enough power in the shade or in the dark. I purchased a solar charger that has an LED that indicates when the panel is producing some voltage. The problem is that the LED is in a plug that is inserted into the cigarette lighter socket. At night, when the solar panel is not generating electricity, the LED remains lit and drains down the battery. I do not know what else in the solar charger circuit is draining the battery but the battery voltage when down when I forgot to unplug the charger at sunset. Do LDRs come in different sizes capable of conducting different amount of current or are they used in circuit that require a transistor to amplify the current flow?
I don't know how to thank you. I was so confused that I was almost ready to give up. Your video really explained the concept very well that I wanted to know so badly. Thank you so much 🥰
This is the best explanation I've search about ldr for whole 2 days. very easy to understand for normal people like me
I have looked everywhere to have this explained to me - absolutely brilliant. Thank you ! I just couldn't understand how a LDR could turn a nightlight on, since in low light the resistance is high. Only doing GCSE Physicis (trilology), but there was a 6 mark question at the end and I was really struggling with. Thank you so so much.
I extremely concur with you dear
Bulb resistance is very low only in ohms and LDR still high in Kilo ohms how 1 amps current will go through LDR circuit during day in light.
Literally the best piece of work I encountered regarding the topic.......none of my text book or any other platform on internet served as I require......the only video I found to enlighten my concept and spark magnificent learning And understanding
Fully contented
I was so confused how the ldr worked when the resistance is high if it’s dark. This video just made me understand it 100%. Best explanation on the internet. Thanks
you helped me a million fold with this, thank you for explaining so easy to comprehend, and now my mother in law who.lives in the jungle of mexico will have a solar light and won't have to flick a switch, thank you may god bless you and keep blessing you
THANKYOU SO MUCH! I could not understand this, despite 3 different revision guides and many other videos but now finally I get it!!!! THANKYOU!
Watched in HD, gained maximum educational benefit. Great video, really easy to understand.
i looked everywhere to understand and i finally came across this and thank you i finally understand!
So many people state you can use an LDR for e.g street lighting, but DO NOT EXPLAIN HOW, thank you sir!
Absolutely fantastic, beautiful, life changing some would say
I've always wanted to understand this, thanks for explaining it very clear and simple!
Thank you for the explanation. I had a power line crew running secondaries to streetlights. I asked them if they isolated the feed and they said it didn't matter because the photocell isolated the power from one streetlight to another. Your video explained to me how wrong they were and the potential for injury was real.
Thankyou so much! This helped me loads! You explained it in the best way possible and I am really grateful that you uploaded this.
A great educational video clip... We need loads more on tricky topics such as this please
Thats wonderful, you're good at explaining!
Best explained ldr video on TH-cam so far Thanks a lot .
Brilliant explanation, very easy to understand- thank you!
Thank u sir I’ve been struggling with this concept for a couple weeks now! Great video!
Thank you so much for this clear explanation, I was really confused before but this has helped me so again thank you!! Really appreciated 🍃
That was a fantastic explanation! Thank-you so much
This is explained so badly in text books...thankyou so much for making it clear and easy to understand!
Thanks, perfectly answered the question in the forefront of my mind!
Great video - Very helpful. Thanks!
Clear, straight forward explanation. Thank you
Thank you so much! This was such a quick and perfect explanation.
Thanks a lot for this video. Helped me understand the context for my ISA in physics. Really well explained.
that was amazing.I never thought it was this simple. realy thanks a lot
Thank you so much...This was so clear, and simple..It helped a lot❤
You my friend are an absolute legend
youre just brilliance at its peak!!!
AMAZING EXPLANATION
THANK YOU SO MUCH SIR👍🏼❤️
Great video sir!
Read through Wikipedia, watched multiple TH-cam videos, and it wasn't until I watched your video that I finally understood what photoresistors are and what they do. Either I'm really stupid or you are a good teacher. Thanks!
i finally understand why a lamp at night turns on when the resistance of the LDR is high- essentially the flow prefers flowing through the lamp as there is less resistance. Likewise, during the daytime when the LDR's resistor is low, the current mostly flows through the main part of the circuit, not the parallel bit. The lamp could have a slightly higher resistance than LDR
actually, more like less current will flow through the LDR at night when it has a high resistance, leaving more for the filament bulb.
Thank you so much, this exactly answered my question!
Thanks man for the great explanation!!!
Hi.
Just started Learning Basic Electronics from a Book.
Your Tutorial on the LDR, was first-class.
I am in the U.K.
very helpful, a great explanation!
Finally today i learn this thank you sirmay ALLAH bless you😉🤘
Thanks a Lottt.
I was getting so confused while writing the working, that if the resistance is high there is no current flow so that should have meant the streetlights would not turn on in the dark...
You are soo practical .this small video clip meant a lot to me. I know about them but when we apply them we get stuck .thanks alot
wow thank you so much, that makes so much more sense, that's so so helpful!
Thanks for this video, it was very informative and helpful.
:D
You're a legend mate. Really clear and helpful
Dude u r simply awesome
awesome explanation . . .thank you very much.
Thank you so much
This was so clear
just subscribed.... Coz only you have explained the circuit and nobody else did....
thank you sooo much!!! you made it sound really easy!!! :D
Perfectly explained, I was literally thinking about the logic of why is resistance increased at night when clearly current will be less, but now I understand so thanks for that. But just wondering is there an easier way than this to turn street lights on because this method is a sort of reverse psychology kind of method, isnt there a faster method where amount of amps is regulated to low/high staright away and doesn't need an ldr in a circuit?
Great Explanation thanks!
Thanks a lot for this video!👍
This is what i needed to finally make sense of electricity, thanks
Thank you so much wasn't getting the logic behind it but now I get it 😁
Thanks :) Got my exam tomorrow helped me how to think of potential dividers, so yeah thanks ^^
As you accept ,'its not very efficient', but the basic theory of LDR & how it works has very nicely been explained, just like a professor explains in the classroom on a black board. Keep it up, Mortimer123. Very useful for the students.
thank you sooooooo much, i never understood until now
thankyou so much!! so helpful!
omg im so happy i found this thanks a bunchh
Helped a lot! Thanks
awesome....
cleared my basics
very helpful video and it is so easy to understand
Thankyou so much! understand my ISA context now :)
Really good. does this apply to 230v power supply?
thanks sir . it's very nice circuit 🙏🏻
This video really helps :) thanks
Hello sir! Gr8 video! Just a qn… how abt when the light bulb is parallel to LDR? That set up will only be useful at night rite?
Thank you for the video
Loved it
super video☺
I understand...have been wondering how street lights worked for yonks. Thanks!
How much I had to search to eventually understand how LDR is used to control lights. Such a simple explanation! Everywhere you look you find the same thing, resistance of LDR increases as the intensity of light decreases and vice versa but how does that explain the use of LDR in controlling lights? I just understood without even watching the whole video. Thanks
Well there is the secret I have been missing, what every electrician needs, a big metal bracelet to dangle over your circuit board. Anyway great video I gave a thumbs up
Very helpful!! Thanks!
It was very useful.
How can i use both IR sensor and LDR together to detect any object and to light get on automatically
Thankk youu !! so helpfulll honestly
thank the gods for this video
wonderful but will it work without transistor
Nicely explained
but this would mean that you'll always be drawing 120w (based on your numbers) regardless whether the light is on or off right?
is it possible to use a mosfet here?
would be jice if you can provide an example
This is informative... thanks
lucid explanation..thnx alot
thanks you very much for explanation
Thanks it was helpful.
Thanks sooo much!!
I saw a circuit diagram in the net where in addition of this circuit,2 BC547 transistors were added.What is their use...?
to help control the current that is flowing to the bulb, the fixed resistor is for the bulb, not the LDR, u need it there otherwise the bulb will burn out as most battery will produce a lot more power than a bulb can handle.
Thanks very much!
this is great...thnks a lot..
Mr Lall, A serial setup is not useless. If you connect a solar battery charger to a battery, you would want current to flow through the circuit when the solar panel is in the sun (or daylight). But you do not want current to flow when the voltage generated by the solar panel is too low (or zero) to charge the battery because the solar panel is not generating enough power in the shade or in the dark. I purchased a solar charger that has an LED that indicates when the panel is producing some voltage. The problem is that the LED is in a plug that is inserted into the cigarette lighter socket. At night, when the solar panel is not generating electricity, the LED remains lit and drains down the battery. I do not know what else in the solar charger circuit is draining the battery but the battery voltage when down when I forgot to unplug the charger at sunset. Do LDRs come in different sizes capable of conducting different amount of current or are they used in circuit that require a transistor to amplify the current flow?
Thank you!
thank you so much
nice explanation
thank you so much!!!
Thanks
From somalia
Thanks for sharing. Dear can you please share the LDR circuit with 12 v relay for day/night bulb control.
very very thanks i made it working great
thank you!
Thanks you so much, can you please do the same circuit, but with a transistor and explain the operation of it. That would be awesome if you could.