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.
Light heats a photocell, and the difference in temperature creates an electric current(:
Yes
light of a cell
I might be wrong on this one, but I believe it is either a cell or a photocell. A cell would be correct, a photocell converts light energy into electrical energy.
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.
it creates a dc current
By covering the photo cell and if the relay coil doesnt work.
Photocells are designed to work at night when it gets dark and turn off in the morning when it gets lighter. If the photocell is on during the day then it is not working the way it was designed to. Time to get a new one.
By covering the photo cell and if the relay coil doesn't 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
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
It will if it can not 'see' the light.- ie, if there is a shade or something between it and the light.
Light heats a photocell, and the difference in temperature creates an electric current(:
You can buy 6v photocell dusk to dawn switches from Acetek photocells
the roof is slanted so you will need to put your photocell on the side of the roof where the sun is shining
Yes