How to make LDR Darkness Sensor Circuit Simple DIY

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In this video i will show how to make LDR Darkness Sensor Circuit
Asimple science school college project.
BY USING THIS CIRCUIT WE
CAN TURN ON LIGHT IN
DARKENESS
& TURN OFF THE LIGHT IN BRIGHTNESS
ITEM REQUIRED
1) LDR-----1No. amzn.to/2rNr33i
2) 50KOHM RESISTOR---------1No.
3) 1KOHM RESISTOR---------1No.
4) BC547 TRANSISTOR---------1No. amzn.to/2rNxpjm
5) 9V BATTERY---------1No.
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electricdiylab.com/ FB page :- / innovativemr
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Rotary tool :- amzn.to/2FM3Lnh This video is made for entertainment purposes only. Please use judgment, care, and precaution if you plan to replicate. WhatsApp for custom projects [phone]

[@philipdalton1000s]

I designed something similar to this and managed to get it published in a magazine. My idea I thought up was a "Digital Darkness/Light Measurer". It used a light dependent resistor and a 556 silicon chip, amongst other things, to measure the amount of light or darkness in a room on a scale of 0 to 9, on a digital display. It was published in the "Everyday Electronics" edition of April 1983. I was paid £12 for my work.

[@nayyarrashid4661]

My Uncle who is a radio mechanic made the same circuit in the 80s. He used a power transistor and cut it on the top to make an LDR and he installed the bulb outside in the street. The bulb would go on when the sun set and provide light to passerby at night time.

[@rupendrasonimat5244]

Increasing resistance to 2k and exposing LDR to high intensity light worked for me you can also try it
Thank you for the help 😊

[@ishakohli2140]

This video was really helpful....my physics project was really appreciated 👍👍

[@tommygun9416]

Hey guys, great video. Are you able to tell me the resistors I'd need to run this off 4.2V please?

[@mukulsharma686]

Can we attach it with a mode of smart street light but the is a swetch can we take out the switch and place the sender please tell fasr

[@ProfessorInventor]

You are a genious Engineer

[@the_jd6967]

I am planning to make this my first electronics diy project

[@rahimahjofferi3560]

Its a great and helpful tutorial, thank you! but what if I want to add 13 more 4.5 lumens of LEDs to the construction to make it brighter? Current limit is 25mA Do you mind helping me how the construction is going to be like? For eg. how many more resistors do I need to add and what are the values for each resistor? Your help and response would be more appreciated!

[@ProfessorInventor]

I also have made a shadow detector circuit. You can also watch it. th-cam.com/video/f1Seudbs5F8/w-d-xo.html

[@Pehesara_Gaming]

Make a relay circuit

[@practicallab]

its so simple circuit if we connect 100 k resistor with series with ldr it also properly work and if ldr ressitor value in kilo ohm connect mega ohm resistor with ldr it will also work.nice

[@ajazamin9843]

please add a potentio meter to adjust the sensitivity of LDR. your project works only if there is immense dark inside the room what if there is partially dark inside the room.

[@minjaeson5286]

Is there a common emitter circuit or a common collector circuit in this circuit?

[@sam-ip7nn]

Yess!! It works perfectly

[@dkyadav8973]

hlw, bro..! i was make this circuit using LM 358 & A 3.7Volt Li-Ion cell, also used a VR 20k.(for dark control) for my 12smd (6530) LED strip. i was also use a Darlington BD039 transistor, at output of lm 358. the circuit well opereted but a problem has found, during at off position, the circuit dissipate battery charge. have you any solution to prevent from this issue ? please reply as soon as possiable.

[@ewanenkumberamsey1711]

wow amazing i like the project, but I have tried doing it using 2N2222 transistor but not working

[@trons1965]

Muchas gracias por tu vídeo, podrías enviar una foto con el circuito en placa por favor?

[@ProfessorInventor]

I also have made a shadow detector circuit. You can also watch it. th-cam.com/video/f1Seudbs5F8/w-d-xo.html

[@santossifuentes2594]

Excelente.. pero tengo una duda que pasa si no utilizo transistor? Funcionaria?

[@sudeshnadhar2987]

Please give a ac to dc converter circuit with item required with value

[@EdwinFairchild]

man one full view of the schematic would have been great , some of us dont need to see the wire going inside the breadboard, just a schematic shot for those who can read it and move on

[@FlowerRFabulous]

thats literally how i feel! and i dont need the music. i need the explanation behind how everything works!!!!

[@unionpacific7]

It is a link on description, click and you can find the schematic.

[@mr.mythoclast4451]

LED+ to VCC and LED- to Collector
Resistor to VCC and Base
LDR to Base and GND

[@LorDToxchY]

Selfish

[@cardsigner]

Negative. Actual video showing that it works, is in accordance to Galileo Galili's scientific method, proving that it works.

[@asiantific]

Can i replace buzzer with dc motor? I want to make something move when the laser is cut.

[@alberthoek2506]

Thanks man it works

[@bohemio224]

but how do you remove the flicker that is caused by the threshold between afternoon to enter night and vice versa?

[@superfact4556]

Thank you very much

[@Bianchi77]

Creative video, thanks for sharing :)

[@krishnatkkb5101]

Will it work if use 20k r instead of 50k

[@himanshukubde76]

I made the same project but it is not working can you tell the reason i make the same connection

[@karthikkonagalla6414]

It is working...thank you😀

[@velusamy1833]

Bro for me working when light is there

[@b.tech-beingtechie8450]

@velu samy
If u r getting it in opposite conditions interchange the position of ldr and resistors

[@usmanghumman021]

Can we connect buzer with led

[@iamsaood]

Very basic very useful

[@butikito]

Hi I am not an expert in electronics/electricals, I need help on my solar lamp post. During daytime, it automatically switches off. But comes night, it doesn't turn on automatically. It comes with a remote control that I can switch on manually. What could be the problem? Can I rig the remote control and add a photoresistor LDR and put something to press and hold the ON button? Where can I connect the LDR in the circuit of the remote control? What is the specs of the LDR? The remote is powered by just 3v 2x1.5AAA battery.

[@hasmithanakka3061]

Can u explain its working wt happens

[@egongaertner]

I am right if I think I need to switch the 100kohm (2 50k’s ) resistors to one 10k resistor if I want to use a 5 Volt source? And can I use other transistors. I have some PNP transistors.

[@ProfessorInventor]

I also have made a shadow detector circuit. You can also watch it. th-cam.com/video/f1Seudbs5F8/w-d-xo.html

[@vinodvaisak2486]

Will only the exact resistor will work??

[@KarthiKeshRobotics]

its working bro super

[@RahulKumar-ms2zv]

Thnk

[@KarthiKeshRobotics]

subscribe to my channel bro and share pls

[@RahulKumar-ms2zv]

Ok

[@ItsSwarnim]

Jhootha

[@sarveshtiwari4451]

Not really good

[@krithirai8922]

Can v do with long bread board

[@sowmyakulal4786]

Its very best and easy😀

[@DeenuYogiMS]

It isw working!Thank you

[@MANIKANTAVINJAMURI]

Hlo is it really working??

[@praveenkumardas4555]

If we use small buzzer in case of led will it work?

[@MrInnovative]

Praveen kumar Das yes it work

[@sibijudepr7438]

it will work

[@arduinoandbeyond1668]

Is it neccesary to have the transistor and resistors? Cant you just use the power, LDR and LED?

[@ChetanPatel-gl9jg]

Its working
A kam kesa karata ha wo jara likh k batayo sir
Plz help meb

[@MystCraft.]

can it work reversly like it will stay on till is in light and gets of when lights go out

[@creativebangladesh3801]

It is working I love your chanal

[@zafaraj8211]

Yessss!

[@artuino9404]

Can we use bc548 transistor

[@navyajoshi8329]

Can we use 100oms resistor

[@dakshagrawal3520]

Can i make it without using that particular board that u have used?
Plzz reply

[@abhishekgarad1072]

thank you gb

[@MagicSmoke11]

How to use it with a variable resistor or POT ?

[@dipalikhartmol8922]

Can I use one more led in series

[@krishan_gupta_07]

Thnku so much.

[@susanthkothapalli6688]

Help ..how can I increase sensitivity of the LDR?

[@maahir3871]

How does these resistors help in this circuit. ?

[@gayanSasanka]

hi thank you for this can you tell me how to get 12v power out from LDR Circuit, not 3v I want to set a siren or alarm for this

[@mr.mythoclast4451]

LED+ to >500Ohm Resistor to VCC and LED- to Collector
Resistor to VCC and Base
LDR to Base and GND

[@pradiumkumar9060]

sir whats the use of the IC you have used i think even a parallel connection would have worked.please clarify

[@zafaraj8211]

No IC has been used in this circuit. It is a transistor or LDR.

[@ownerzennc3812]

i tested something this circuit also works with an 2n2222 npn transistor!

[@Thepeter956q]

Great job. What are showing to the people. Where are the safety equipment. How you can work with electric like that. I know the power as so low but what the people will learn. If any one tries this with 220V without PPE who will be responsible

[@OXFORD486]

How long will the battery last?

[@Ko-gy6cb]

Merci !

[@AbdouAbdou-si6mi]

Nice video thanks, anyone can tell me the principle of this circuit, as i know when it get dark the LDR resistance increases, thanks in advance.

[@b.tech-beingtechie8450]

Total volage from the battery is diatributed to the resistor and ldr.. During light condition resistance of ldr will be less, so more voltage will be dropped across resistor (voltage = current x resistance)
During dark condition resistnace of ldr is very high, so potential across ldr is also high which makes the transistor on

[@ProfessorInventor]

I also have made a shadow detector circuit. You can also watch it. th-cam.com/video/f1Seudbs5F8/w-d-xo.html

[@ramprasadyd7406]

Can I use dc motor in place of led

[@kaushanudebnath5562]

Thanks bro, it works perfectly

[@rohanjha1156]

Can I get your phone number, I want some help for this project? Or can we talk in instagram if you can share your id name. My id name is rohanjha150? Please reply 🙏🙏

[@mr.pirate9855]

Can i use any npn transistor

[@vjitesh13]

Can I use diode in this circuit please tell ?

[@jeremynicolas5017]

please show me the full schematic diagram because i wanted to make robot that will have a sensor like that

[@rhitvi6002]

will 47kohm resistor work instead of 50kohm resistor

[@dasautomotive]

Please show full circuit drawing...

[@hudsonsamraj4960]

It works 😇
After 'n' number of times lol !

[@samirgajbhiye6720]

Ho

[@saisandhyadinchetty7141]

Plz frnd tell us truth because I need to implement it in my project plz

[@deviprasad1531]

Can we use the 100k in place of 50k 2

[@shreyapande3159]

Can we run motor in place of led

[@voizek]

Yes

[@abhijithanilkumar4959]

Good idea

[@jiwanbiswal]

dude did u used it for class 12 physics investigatory project

[@ayasaldoski8113]

Can you make it revarce i mean when it is dark the power will go on the led

[@mohamedf4661]

thank you

[@miadikim]

very good video

[@maskomsko1736]

Sir please reply whether 100K resistor or 150K resistor is required🙏🙏. You using brown, green, yellow gold resistor that is 150k resistor

[@ganapathisastry5945]

vedio is Nice but I have a dougbt What is the resistance of LDR

[@maninder92mander]

Can be use single resistor of 100k

[@ajitkumar-jx8lt]

Will it work if I use 5 resistors of 10k ohm on series instead of one 50k ohm resistor ?

[@b.tech-beingtechie8450]

@ajit kumar resistor value depends on the resiatance of ldr during dark condition, it need not be 50k always

[@j.kelectrical]

sir 12 volt pat chla sakte hain our 548 use kar sakte hain batae plz

[@amjadatta7797]

Can we take Resistor of our Choice ?

[@megamindtesha2454]

Thank you so much

[@danieldailey2622]

I want to use 220 V ENERGY BULB AND A DC CURRENT TO POWER IT ON, WHAT DO I NEED TO DO?

[@yourchillbro500]

if I wanted to code this for assembly language, where would the input and output be located in this circuit for me to plug into a microcontroller?

[@b.tech-beingtechie8450]

@dari r
You could configure any one of the port pin as input port and give the connection from the junction of led and resistors to that input.. Configure another pin as output port and connect it to transistor

[@sasykes68]

Nice one, substituted a n2 2222 transistor and used 5v usb power supplied to a power board on the breadboard. Thanks!

[@emadabuhagag222]

THANK YOU

[@arjunabandara8034]

How LDR work s

[@sridharghss]

where get the board?\

[@vishalkumar-qq7rf]

Can i use 10 led?

[@ash0787]

it worked good but to start with it was not changing much so I tried a different transistor, the one which is working for me is BC337, and I had to do two 100k resister in serial to make it nice

[@c4pubggaming204]

Can you make a circle map?

[@TrungTran-hw7ws]

very cool project

[@mulpurubakthasingh1247]

bro , for me always led is in on condition

[@ParthPatel-uu9gh]

Same here problem

[@zas-fp9gt]

I had the same problem....I figured out that LDRs are not that sensitive in our homes or our daily environment....it should work in direct sunlight or when you throw torchlight on it...Hope it helps 👍

[@hariprasadshanmugam9363]

@@ParthPatel-uu9gh change the resistance bro..

[@ProfessorInventor]

I also have made a shadow detector circuit. You can also watch it. th-cam.com/video/f1Seudbs5F8/w-d-xo.html

[@mulpurubakthasingh1247]

@@ProfessorInventor THANK U

[@sibijudepr7438]

yes, it works

[@ferdoushasan3117]

SIBI JUDE P R how? Plzz help me

[@Sciences-Database]

Yeah This Circuit is very helpful. this darkness for The transistor bc547,s availability Because you are plugged into the transistor BC547.
.. Confident For Scientific management
! >> Like.

[@nikhilsharma5233]

Explain the principle too

[@practicallab]

Very nice

[@ms.goodgirl6804]

Can i use bc 547

[@ethanroberts2814]

Can you show how to do this but connected to an LED strip

[@susantasahoo5307]

Super

[@hobielektro]

Mantap dan keren 😎😎😎😎😎😎

[@vishalyadavrockstaar3451]

Can you please show this connection by wires but not on PCB .please fulfil my demand

[@sriramhegdegk8345]

I have a sensor as showed in your description 105 rs what to do with that