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Agent 009 · 8th October 2005, 08:41 PM

What's a Cds cell

ops: :?:

Someone Electro · 9th October 2005, 04:58 AM

Its a photo resistor. It changes resistance acording to the light falling on it.

madmikejt12 · 9th October 2005, 07:57 PM

it is similar to a LDR, does it work in the same way or the oposite way? im not quite sure

Someone Electro · 9th October 2005, 08:01 PM

I think Cds means Cardium sulfate wich is i thnk used in these things.
A LDR is Light Dependent Resistor.

There are other ways of detecting light like an photo didoe,photo transistor,LED,solar cell...

madmikejt12 · 9th October 2005, 08:21 PM

yes but a Cds wired up to just a battery and a light/ buzzer will come on ONLY when there is light, is it the same for an LDR?

also, instead of the 50k pot used in this circuit, could i use a 10k? what would be the diference?

It's just that i broke my 50k

ops:

Edit: oops sorry, thaught it was in the nightlight thread, i got confused because both threads contain the word Cds cell in them lol

Someone Electro · 10th October 2005, 04:52 AM

Just delete the statements about the pots and this post fits in hee.

But if you conect an LDR in seris whith an batery and buzer wont it then waste a lot of power.Becos an LDR wond go fuly off anf full on ir will just change its resistance.So wen the buzzer is off the LDR is still pasig some curnet trough but too smal for the buzzer to run on and that is wasting the baterys.

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8th October 2005, 08:41 PM	(permalink)
Agent 009	What's a Cds cell ops: :?: __________________ May God be with you. My Blog

9th October 2005, 04:58 AM	(permalink)
Someone Electro	Its a photo resistor. It changes resistance acording to the light falling on it. __________________ Il give you shocking experience.

9th October 2005, 07:57 PM	(permalink)
madmikejt12	it is similar to a LDR, does it work in the same way or the oposite way? im not quite sure

9th October 2005, 08:01 PM	(permalink)
Someone Electro	I think Cds means Cardium sulfate wich is i thnk used in these things. A LDR is Light Dependent Resistor. There are other ways of detecting light like an photo didoe,photo transistor,LED,solar cell... __________________ Il give you shocking experience.

9th October 2005, 08:21 PM	(permalink)
madmikejt12	yes but a Cds wired up to just a battery and a light/ buzzer will come on ONLY when there is light, is it the same for an LDR? also, instead of the 50k pot used in this circuit, could i use a 10k? what would be the diference? It's just that i broke my 50k ops: Edit: oops sorry, thaught it was in the nightlight thread, i got confused because both threads contain the word Cds cell in them lol

10th October 2005, 04:52 AM	(permalink)
Someone Electro	Just delete the statements about the pots and this post fits in hee. But if you conect an LDR in seris whith an batery and buzer wont it then waste a lot of power.Becos an LDR wond go fuly off anf full on ir will just change its resistance.So wen the buzzer is off the LDR is still pasig some curnet trough but too smal for the buzzer to run on and that is wasting the baterys. __________________ Il give you shocking experience.