How To Make A Dark Sensor

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This video will show you "How To Make A Dark Sensor" in very easy steps
The things you need are:
*BC547 Transistor
*100K Ohm Resistor
*470 Ohm Resistor
*LDR (Light Detecting Resistor)
*LED (Light Emitting Diode)
*Wires
*Breadboard
*6V Power Source
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Опубликовано:

23 дек 2012

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Комментарии : 71

@philiptyg 9 лет назад

with this video I finally got a dark sensor to work. Great job and thanks

@Kryptocode215 8 лет назад

Thank you for posting this. Because I have found this, I figured out how to create a Dark Activated beeping Lamp Blinker with me Electronic Experimenter Set.

@TheSaunaksahoo 10 лет назад

Thanks bro! A very good tutorial indeed!

@upenupen4541 8 лет назад

thx dude for tutorial

@gauravyashjain 11 лет назад

We usually buy resistor specifing the "Ohms" or "Resistance"...... But, since this is a small project & the power is aslo not much the wattage should be around 0.5 (1/2) watt - 2.5 ( 2 1/2) watt....... :)

@sakshamgupta2004 8 лет назад

works cool! I made one for myself

@sakshamgupta2004 8 лет назад

+Saksham Gupta great job.I made it like a night light by adding a 3.7v filament bulb.& kept it near my bed.great

@wandereview 9 лет назад

Wow this is cool. Can you show us your code in the arduino application?

@soniarodriguez6285 8 лет назад

Just one question, is the led light variably? For example, when is darker, it shines the most? when the light is medium, it shines medium? Or is it a just on-off?

@priyanshubastia6784 7 лет назад

Any replacement for 457 resistor and will it work in BC548 transmitter

@hafsakhalid487 8 лет назад

hi your video was very helpful to me can i please get its circuit diagram and working?

@AmazingVangari 7 лет назад

why you do not use a 100k pot to adjust the sensitivity?

@harpazorestrainer 9 лет назад

Can you use a 3.7 v battery with only one resistor and have this still work?? Thank you

@gauravyashjain 11 лет назад

ThanX......... :D :)

@ParthSarthiSharma 10 лет назад

from where can i get a 6v power source? or how to use battery regulator in circuit?

@jayrdeleon625 6 лет назад

is it ok with 3.7v as power supply?

@chowdhury1003 11 лет назад

Where did you connect the last two wire on the board.

@irisheremoto2518 8 лет назад

what if you want to put a beeper or a buzzer to this project? what will you do? what things would you add?

@rochakduniya7145 6 лет назад

yes u can use buzzers too but there will be a little change in the circuit

@curtisneedham6083 11 лет назад

What wattage are these components and what range is the LDR?

@shabirsaqebi2762 7 лет назад

how to get the opposite behavior. i mean when u put light on the LDR the LED gets dimmer. please reply faster because i need the answer so much

@dineshj811 8 лет назад

I made this circuit but it's working reversely means when outside light is on led glowing during outside light off led is also off can you help me please......

@jayosbornecarter7100 9 лет назад

Hi great vidio, iv'e made 4 of these' but how do i go about increasing the dc voltage or using ac? Without burning it out!

@gauravyashjain 9 лет назад

jay osborne carter Change the resistor

@Arunava621 9 лет назад

in case of ac you have to use diff circuit using relay

@deekshantwadhwa 8 лет назад

How can i attach multiple LEDs in this circuit? What should be the value of the resistors which i need to take for that?

@aqeelahmad9867 7 лет назад

100 ohms and 1k resistors u will need

@boffinschist1098 7 лет назад

LIght stays on even in light and even when I unplug the LDR

@bvnchennai4178 9 лет назад

can we use a 9 volt battery without using a regulator

@bryancarlos3334 10 лет назад

is it okay to use a 3volts electric fan than using an LED? what would i do or what will i change? please i beg you.. its for my project

@gauravyashjain 10 лет назад

yes u can use the electric fan instead of the LED... if the fan doesn't work omit the resistor which connect the LED...

@nelvinvenancio2711 10 лет назад

Gaurav Yash Jain - AYJ is it okay to use both buzzer and LED at the same time? Btw, thanks for sharing this vid. I'm more interested now :)

@abdullahalmasud8829 8 лет назад

Does it works with low voltage ?! (3V/4V)

@aqeelahmad9867 7 лет назад

no bcz the resistors r used to make 9v battery current 1.5 so if u will use a small volt battery it wil explode and the current will be changed into 0v so the led will not lit up bro

@davidvilla9874 10 лет назад

Can we use a BC337 TRANSISTOR NPN 500MA 45V

@aqeelahmad9867 7 лет назад

no u cant use

@shohelrana-up1vr 8 лет назад

Why dark sensor is not work? But light sensor worked well.pls tell me something.

@aisyahhusniagarini1577 8 лет назад

Could you tell me what type of transistor you used?

@bassemeltamboly 8 лет назад

+Aisyah Husnia npn bc547

@aqeelahmad9867 7 лет назад

2 bc 548

@rochakduniya7145 6 лет назад

those are npn transistors....u can find a wide range of those

@akshanshsharma5558 8 лет назад

can i use an IC instead of the transistor

@winorous5876 7 лет назад

Akshansh Sharma yes ofcourse it would be more wonderful😃😃😃

@anujaparab1075 8 лет назад

can i get an idea to make a touch sensor????????

@aqeelahmad9867 7 лет назад

yes but its do difficult u will need an aurdino

@adityajayaprakasan4477 9 лет назад

Can we use a 9V battery?

@aqeelahmad9867 7 лет назад

yes of course u can i also used and it work fully

@samyakshakya6449 8 лет назад

what are the powers of these resistors

@aqeelahmad9867 7 лет назад

100 ohms and 1k

@boffinschist1098 7 лет назад

it said 100k ohm in the video. i tried 1k and it's shitloads brighter (soon death?)

@Mugen763ify 7 лет назад

why dose mine work upside down... light sensing

@ahmarwaheedkhan8681 7 лет назад

circuit diagram plz???

@jackieeogbando 9 лет назад

Does it work without resistors?

@gauravyashjain 9 лет назад

Heist Jacqs Rarely... only if the the input volt is sufficient to light up the LED and not burn it out.. also it should be appropriate with the LDR and transistor so that the LED doesn't remain glowing all the time

@jackieeogbando 9 лет назад

ok thanks!