Photoelectric smoke detector

[wftan]

May i know what component, IC or chip i need when i want design photoelectric smoke detector?

Where can i get the datasheet and circuit for my design?

Thanks you!

[ober]

Hi, can you explain what is photoelectric smoke sensor?

[wftan]

Photoelectric smoke detector is like light sensor.

Light source transmit light to detector in normal condition.

During smoke particle occur, the light were scatter the light and detector sense there have

reduce in current. Smoke detector will detect.

So, have any idea to do this circuit?

[ober]

Er.... I think I know what you mean, we do not carry this kind of sensor. But you should be needing this sensor

[wftan]

i find one circuit from internet, dun noe cytron provide transistor : LS400, 2N712 and

C106F o not?

coz i find from price list, not see tis product name.

if not, wat type of transistor can replace these 3 type transistor?

[kl84]

Easy..just study the datasheets of these three items and make comparison with those available in Cytron's stock. Initially, you need to know what they really are before you decide to purchase them. Now, you need to know them thoroughly before you can find the substitutes for them.

[wftan]

ok... thanks...may i ask RLA 12V stand for what?

[kl84]

I think it means relay. Where u find the word?

[robosang]

I think like kl84 say, it should be relay, why you need relay for your smoke detector?

[wftan]

i find this word from

website http://www.dianlut.com/k/baojingdianlutu/guangminbaojingqidianlu/2009/0714/2368.html

Can u go there take a look, it is that simple circuit suitable to design smoke detector???