Topic: Photoresistor
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What is photoresistor?
Also known as a photoconductive cell or light dependent resistor. (LDR) A device whose resistance decreases with exposure to light. Read More »
Source: http://www.answers.com/topic/photoresistor
What are photoresistors for?
Detecting the presence or absence of light (typically). They can also give an indication of the intensity of light. Stores use them to check customers entering and exiting. They are used in elevators to make sure that the doors don,t close ... Read More »
Source: http://answers.yahoo.com/question/index?qid=20110920170658AANKyso
How do I attach an photoresistor to the board?
The following schematic shows the basic circuit. If you pick the resistors correctly, you can make the output of this circuit vary between a little over zero and a little under five volts for your range of light intensity. To pick the resis... Read More »
Source: http://web.mit.edu/rec/www/workshop/photoresistors.html
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Photoresistor
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this may be of help to you http://www.acroname.com/howto/photoresis…
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Source: http://answers.yahoo.com/question/index?qid=20111102150624AAt8m6V
So you have the light bulb, but do not have the other parts? How do you know it won't work? Your second link doesn't work, so I have no ides of what photoresistor you will be buying, but most all of these have too high a resistance to allow...
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Source: http://answers.yahoo.com/question/index?qid=20100228235233AA4f3gw
A photoresistor or Light Dependent Resistor or CdS Cell is a resistor whose resistance decreases with increasing incident light intensity Phototransistors (or opto-transistors) consist of a photodiode with internal gain. A phototransistor i...
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Source: http://answers.yahoo.com/question/index?qid=20081013181223AAHuuNx
Photodiodes are more efficient, they have higher resistence (in general) that makes them more suitble to be used in "slim" devicies that should consume less power. And they are more sensetive. although it's in general.
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Source: http://answers.yahoo.com/question/index?qid=20070424032042AA8SWwa
first of all, you cannot parallel LEDs, since the Vf can vary a lot from unit to unit, in your case by ±0.5 volts. The one with the lowest Vf will draw all of the current and probably be too bright and burn up, with the other three being di...
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Source: http://answers.yahoo.com/question/index?qid=20090213084526AA1FbLz
Recommend Amazon: http://www.amazon.com/gp/redirect.html?i…
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Source: http://answers.yahoo.com/question/index?qid=20100305161947AAeYdN8
