examples of LIGHT ACTIVATED DEVICES? can u help me?

[JoevicRoi]

guys, we have an assignment, that is to find examples of light activated devices.....can u give me some examples?

 

[JimB]

Have you found any examples yourself?
If so, what are they?

JimB

 

[JoevicRoi]

Light-activated SCR...

 

[4pyros]

Like street lights?

 

[Inquisitive]

Parking lot or building exterior security lights?

 

[JoevicRoi]

I'm not sure, so far what i have found are LASCR, LADIAC, LATRIAC, Phototransistor.....something like this....can u guys give me some more examples ?

 

[JimB]

So, you are looking for individual components, rather than finished equipments which are activated by light?

JimB

 

[JoevicRoi]

I think so..because our prof. gave us that examples...

 

[JoevicRoi2]

But as par as i know,,,,,,,,devices are not components

 

[JoevicRoi]

as far as u know

 

[audioguru]

The new LED streetlights in my city are activated and have their brightness adjusted with an RF modem on each one.
The old streetlights were activated by a photocell which kept a light turned on all day by a bird dropping.

There is a shopping mall near my home that 6 weeks ago had its parking lot in the dark for a couple of hours after sunset because the lights are controlled by a stupid clock that knows nothing about the seasons affect on sunset times. Now the parking lot lights are turned on when it is still sunny.

Add "photo-diode" to your list. A glass diode like a 1N4148 is also affected by light. An LED is also affected by light.

 

[strantor]

LDR,