Physics

What is a photocell?

151617

Top Answer
User Avatar
Wiki User
2010-07-07 01:31:01
2010-07-07 01:31:01

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.

345
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0

Related Questions

User Avatar

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.

User Avatar

Light heats a photocell, and the difference in temperature creates an electric current(:

User Avatar

You can buy 6v photocell dusk to dawn switches from Acetek photocells

User Avatar

the roof is slanted so you will need to put your photocell on the side of the roof where the sun is shining

User Avatar

When light strikes a photocell, the resistance decreases, allowing current to flow more freely.

User Avatar

# Turn off the power to the lamppost circuit at the breaker box. # Unscrew the mounting screws holding the lamp in place, and pull the lamp fixture from the post. Remove the wire nuts, and use the circuit tester to be sure the power is off. # Disconnect the wires to the fixture and the photocell. # Disconnect the locking nuts that hold the existing photocell on the post, and remove the photocell. If your lamp doesn't have a photocell, you'll need to drill an access hole in the post to install one. # Install the adhesive foam ring (provided with the photocell) around the mounting hole. # Run a bead of silicone sealant around the photocell where it will press against the interior of the lamppost. # Push the sensor through the mounting hole, and secure it with a locking nut. # Add silicone sealant inside the lamp fixture at any point where moisture might leak through to the photocell. # Connect the white wires from the power supply, lamp, and photocell together. Secure the connection with a wire nut. Connect the black photocell wire to the black power supply wire in the same manner. Connect the black lamp fixture wire to the red photocell wire and secure the connection with a wire nut. # Reainstall the fixture on the lamppost.

User Avatar

Perhaps they are on a timer or photocell.

User Avatar

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.

User Avatar

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.

User Avatar

photo cell convert light energy into electric power

User Avatar

photovoltaic cell, photoelectric cell, photocell

User Avatar

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

User Avatar

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

User Avatar

The photocell would typically control a relay. The power to the lamp would go to one pole of the relay and the lamp to the other. The common wire and ground would go directly to the lamp. The relay would be normally open and would close when the light energy on the photocell decreased to an amount that would trigger a circuit to close the relay.

User Avatar

Any photocell can be used as detecting light or NOT. It is just an inversion.

User Avatar

light is an electromagnetic wave with a very high frequency

User Avatar

A photocell is a resistor. It is often used as a switch triggered by a change in the light striking it. A solar cell Is an electric device that converts the energy of sunlight into electrical energy through the photovoltaic (PV) process.

User Avatar

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.

User Avatar

a wet cell a dry cell a photocell and idk the last one

User Avatar

A photocell or photoelectric cell converts sunlight into electrical energy.

User Avatar

The neutral is needed for the internal sensing electronics inside of the photo cell switch.

User Avatar

im not sure what photo cell is so ill just use it in this sentence.

User Avatar

It will if it can not 'see' the light.- ie, if there is a shade or something between it and the light.

User Avatar

It's actually the photocellthe solar panel cells! DUH!!!!!!


Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.