I was confused at the last example. But I think I get it. Voltage -> Photo resistor -> Lamp ->Set resistor->ground. As light decreases, resistance in photo resistance increases. As the resistance increases, the photo resistor will draw most of current, leaving the lamp with no current/power. If light increases, resistance goes down in photo resistance, giving power to lamp(on).
I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
V = IR , as r increase, so does the voltage, meaning as it gets darker, the resistance increase and voltage increase too, so for example a bulb needs 5 v to operate but v was less as r was less during day time say 1 v or less which could be some faint light though. But you get the point now ?
I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
@@TheMechatronicEngineer I think you could just use an AND logic gate. One input terminal connected to the photoresistor and the other constantly powered.
i m confusing when at night there is no light to excite electron. than there is no increase in conductivity.. how to used to turn on the light at night
I believe a contrasting example has been given in the end. Actually when the light falls on photo-resistor the resistance increases which blocks the flow of electrons. And when it is covered(in dark) there is free flow of electrons. hope this helps..!!
It is called current divider system. An electric current will flow trough the smallest resistance than the big ones. In this case, we use two type of resistors, a constant one and LDR. Simply the lamp connected to the constant one, and will get the less resistance than the LDR when night comes out. And the current will flow trough it.
@@syaugi5748 I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
Permisi Pak saya mau bertanya seberapa efektif ldr mendeteksi intensitas blue light? Ini pertanyaan buat sy pada saat sidang kemarin, mungkin bisa bntu jawab
The genius of semiconductors! Great video!
I was confused at the last example. But I think I get it.
Voltage -> Photo resistor -> Lamp ->Set resistor->ground.
As light decreases, resistance in photo resistance increases. As the resistance increases, the photo resistor will draw most of current, leaving the lamp with no current/power. If light increases, resistance goes down in photo resistance, giving power to lamp(on).
I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
So you mean it will only light up during the day when the photo resistor has less resistance??? Doesn't make sense
@@wanjeviThat's what I'm confused on
V = IR , as r increase, so does the voltage, meaning as it gets darker, the resistance increase and voltage increase too, so for example a bulb needs 5 v to operate but v was less as r was less during day time say 1 v or less which could be some faint light though. But you get the point now ?
This was very useful, though I don't understand the example at the end.
I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
@@TheMechatronicEngineer I think you could just use an AND logic gate. One input terminal connected to the photoresistor and the other constantly powered.
thank you, great video!
i m confusing when at night there is no light to excite electron. than there is no increase in conductivity.. how to used to turn on the light at night
I believe a contrasting example has been given in the end. Actually when the light falls on photo-resistor the resistance increases which blocks the flow of electrons. And when it is covered(in dark) there is free flow of electrons. hope this helps..!!
It is called current divider system. An electric current will flow trough the smallest resistance than the big ones. In this case, we use two type of resistors, a constant one and LDR. Simply the lamp connected to the constant one, and will get the less resistance than the LDR when night comes out. And the current will flow trough it.
@@syaugi5748 I think she meant that you could connect it to an analog input in an Arduino like development board in a voltage divider configuration and when the voltage at the analog input is lower than a predefined threshold the microcontroller/microprocessor can turn on some kind of source of light.
You can just invert the signal.
@@rachitkaushik2180 I also thought the same but ever where you read its resistance increase in darkness and reduces in light
Permisi Pak saya mau bertanya seberapa efektif ldr mendeteksi intensitas blue light? Ini pertanyaan buat sy pada saat sidang kemarin, mungkin bisa bntu jawab
superrb animation 🙌
Great video (in 1.5x speed, that is)
Really cool!
Thanks. Appreciate it
Question. Will it produce an electron hole and create an electric dipole between electron and hole? Sorry for this question.
It might ejaculate
ofcourse sir... i too have the same confusion
How to repair if damage
Super.
thank you
confusing