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1) A light dependent resistor uses a chemical (typically a Cadmium compound like cadmium sulfide) that changes resistance when exposed to light. It doesn't convert light to current. To use one, you have to provide voltage and measure the change in current as the resistance changes (or you could provide a constant current and watch the voltage change; same thing).
2) A silicon photocell (or solar cell) generates electricity from light. Photons (light particles) hit the silicon and cause electrons to flow out of the silicon (a little more complicated, but you asked for simple).
3) A photo transistor uses light to turn on a transistor. Actually all "regular" transistors are light sensitive. A photo transistor is made to be sensitive and has a window in the can to let the light in.
4) A photo diode is sort of like a photo transistor but used a diode.
That's all from memory, but I think that about wraps it up. Some of these things are really the same things packaged up or specialized for a certain task. But a light dependent resistor is not an electric
A photocell is an sensor that is supplied by a power feed and switches a load e.g:500W light when it becomes dark, letting electricity flow from mains side to the load side of the sensors relay therefore activating the light.
A photocell is just that. Photo means light. It can control a door buzzer or light the porch when some one come up to the house. It changes resistance with incident light. A circuit can be built to use that change.
A photocell, also known as a photoresistor, changes its resistance based on the amount of light it is exposed to. When light hits the photocell, it causes electrons to move, thus changing its resistance. This change in resistance can be measured and used to control circuits in applications such as streetlights and camera exposure settings.
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Why does photocell work during the day?
Photocells work during the day because they are light-sensitive sensors that detect changes in light levels. During the day, when sunlight is present, the photocell detects the increased light and triggers a response, such as turning off a light or activating a security system.
What happens if gamma rays falls on a photocell?
Gamma rays typically have enough energy to ionize atoms in the photocell material, releasing electrons. This can result in a current being generated in the photocell, which can be used to detect the presence of gamma rays.
In a photocell light energy is converted into?
In a photocell, light energy is converted into electrical energy. When light strikes the photocell surface, photons of light are absorbed, releasing electrons that create an electric current.
Can someone use photocell in a sentence?
Sure! "The automatic lighting system was triggered by the photocell as the sun began to set."
What does photocell mean?
A photocell is a device that detects light. It works by converting light into an electrical signal, which can then be used to control various applications like automatic lighting systems or cameras.
Do led floodlights work with a photocell?
A: Photocell and LED cannot work directly because these are different devices. But yes each independently can work as a unit all you need is some buffering.
Will a photocell work using dc voltage?
it creates a dc current
How does a photocell work in a kerosene heater?
A photocell in a kerosene heater works by using light to generate an electrical current. The photocell detects the flame produced by the heater and triggers the fuel pump to continue supplying kerosene. If the flame goes out, the photocell senses the absence of light and shuts off the fuel supply to prevent dangerous fuel leaks or build-up.
How can a faulty photocell be detected?
By covering the photo cell and if the relay coil doesnt work.
Can you wire a photocell to work at night instead of during the day?
Yes, you can wire a photocell to work at night instead of during the day by reversing the connections. Typically, photocells are wired so that they activate when there is less light, which is during the night. By reversing the wiring, you can achieve the desired effect of the photocell turning on at night instead of during the day.
How would a faulty photocell be detected?
By covering the photo cell and if the relay coil doesn't work.
How photo cell function or work?
There is a lot of things when you talked about photocell... well in electronics world of terms the main functions of photocell are for sensing which provides limits or safety.Read more: http://wiki.answers.com/What_is_the_function_of_a_photocell#ixzz1lZGBI2wU
Am using a photocell in a 9volts dc circuit will this be enough to produce an output?
A: A photocell is like a variable resistor it will change resistance with light the ratio of dark:light resistance decides the output. So yes it should work with 9volts
Why does photocell work during the day?
Photocells work during the day because they are light-sensitive sensors that detect changes in light levels. During the day, when sunlight is present, the photocell detects the increased light and triggers a response, such as turning off a light or activating a security system.
Can a photocell work when installed 3ft below a light?
It will if it can not 'see' the light.- ie, if there is a shade or something between it and the light.
Where do you buy a 6 volt replacement photocell?
You can buy 6v photocell dusk to dawn switches from Acetek photocells
How does a roof affect the position of a photocell?
the roof is slanted so you will need to put your photocell on the side of the roof where the sun is shining
