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koshy.dennis
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Join Date: Jun 2007
Location: dubai,UAE
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photocell

12/15/2007 2:29 AM

can anyone help me to find a photocell with 4 wire..?

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RHABE
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#1

Re: photocell

12/16/2007 3:23 AM

Whay not attach two additional wires

or split the existing wires lengthwise?

RHABE
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Andy Germany
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#2

Re: photocell

12/16/2007 4:26 AM

Your question is totally ambiguous, you need to be far more exact in your reasoning and reasons for needing 4 wires, a quick answer has already been added by Knabe, it could have easily been a lot worse from any of us! He held himself back as it is Sunday here maybe...... Otherwise we will all feel you are asking us for joke answers - and you will get plenty!!!

Switch brain on first, describe complete circumstances (mechanical , electrical & electronic) as best you can, with possible examples if you have any and we will try and help.

If you do your best, we will try to emulate your effort in our own.

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Hap
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#3

Re: photocell

12/16/2007 8:13 AM

why not one wire and blind

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Garthh
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#4

Re: photocell

12/16/2007 12:38 PM

You will probably need to use the photocell to actuate a relay.

Please post more details of your requirements: voltage, load, specific app.
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cnpower
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#6

Re: photocell

12/17/2007 2:58 AM

why so many wires on it?

how much power do you want?
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The Worden
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#7
In reply to #6

Re: photocell

12/17/2007 9:03 AM

He probably had an existing photocell like it. Most likely had a two wires for power, one wire for sinking output, and one for sourcing.

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Andy Germany
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#8
In reply to #7

Re: photocell

12/17/2007 9:57 AM

or one pair was for the LED, the other was the built in light sensitive cell or Rx.....used them many times....

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The Worden
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#9

Re: photocell

12/18/2007 8:11 AM

Oop... photocell... read the title and saw "photoeye"!
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Sciesis2
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#10

Re: photocell

12/19/2007 10:32 AM

WHY??

A photocell has no need for more than two wires UNLESS it is a combination light source (Like LED) and photodetector. Two wires for each half. If you need to find a replacement part, and can get us a part number of the dead device, we can certain help. If this is a design you are doing from scratch, we definitely need more information.

Bill
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Andy Germany
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#11

Re: photocell

12/20/2007 7:58 AM

I think the original poster has left and gone elsewhere.....So I am off too.....

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koshy.dennis
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#12
In reply to #11

Re: photocell

02/28/2008 9:11 AM

sorry,,...

i was using the photocell with three wire and nw one of my customer wants a photocell with four wire.

He wants the two wire extra for voltage free contacts (rtu application)

Is it possible since i dont know much abt this

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Users who posted comments:

Andy Germany (3); Anonymous Poster (1); cnpower (1); Garthh (1); Hap (1); koshy.dennis (1); RHABE (1); Sciesis2 (1); The Worden (2)

Previous in Forum: Ultrasound "disruptor" circuit repair   Next in Forum: How Do I Connect Mains To Oscilloscope Input?

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