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Cds Cell Help .

DJDestiny

Sep 7, 2010
5
Joined
Sep 7, 2010
Messages
5
I have a CDS cell with me , but its 3 legged and i don't know how it works .
It quotes S34 On the back yet i don't see anything on google .
It looks horribly like a Solar cell , like as though it was made of silicon .
The shop which sold me claimed it was a Cds Cell yet it only costs me SGD0.60$
I tried wiring up base to positive , collector to none , emitter to a LED .
I saw slightly little effect when i did shine it towards the light , i have no problems with that , i can hook it up to a 741 Op Amp .
But the problem here is .
Center pin was supposed to collect or send more power to the 3rd pin when wired up ?
I saw a huge increase in light intensity , yet not as much as original .
I am totally confused . my lighting here is good , but i noticed the Cds cell didn't work like what i wanted it to (make the output brighter , it just stayed dim ) even when i switched off all lights . :confused:
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
Jan 21, 2010
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25,510
Well, a CdS cell has 2 leads. It has no collector, emitter or base.

You *may* have a phototransistor, or you may have something else entirely.

What does the package look like? When you say it looks like a solar cell -- what exactly do you mean (is it large and flat, blue in colour with silver lines on the front?)

How about you take a photo of it?
 

DJDestiny

Sep 7, 2010
5
Joined
Sep 7, 2010
Messages
5
Much larger then a normal Cds Cell .
3 prongs .
Blue & Green , lines , yes .
Actually , i was going to buy new cds cells , as these just fried my op amp .
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
Jan 21, 2010
Messages
25,510
Not that I suggest you buy from here, but the images of these CdS cells are representative of what you should find.

3 "prongs"? very weird.
 
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