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Author Topic: Where do i find photocells that have actual resistance ratings??  (Read 8998 times)

Tyler1144

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Where do i find photocells that have actual resistance ratings??
« on: September 03, 2009, 05:38:08 AM »
All the sites i go to it just gives me the diameter or something stupid like that, but it doesnt say ANYTHING about light resistance and dark resistance or voltage or anything. Wheres a good site to buy (preferrably smaller) photocells??
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SineHacker

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Re: Where do i find photocells that have actual resistance ratings??
« Reply #1 on: September 03, 2009, 11:19:13 AM »
do you mean light dependent resistors? - A techy at the uni told me off for calling them photocells before  ::) apparently they are different but loads of web pages state otherwise!

most sites should provide the 'dark resistance' which is the total resistance in the absence of light, cpc do:

http://cpc.farnell.com/silonex/mpy54c569/light-dependent-resistor/dp/RE00180?Ntt=lightdependentresistor
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Circuitbenders

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Re: Where do i find photocells that have actual resistance ratings??
« Reply #2 on: September 03, 2009, 11:25:47 AM »
no offence intended here but do you actually do any searching before posting on this board? You do seem to be starting a fair few threads that could easily be answered using the forum search function or by just using google.

Virtually any decent components site like CPC or Rapid has full dark/light resistance specs, usually along with spectral reponse, response time and voltage ratings.
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Tyler1144

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Re: Where do i find photocells that have actual resistance ratings??
« Reply #3 on: September 09, 2009, 02:35:28 AM »
Quote from: Circuitbenders on September 03, 2009, 11:25:47 AM
no offence intended here but do you actually do any searching before posting on this board? You do seem to be starting a fair few threads that could easily be answered using the forum search function or by just using google.

Virtually any decent components site like CPC or Rapid has full dark/light resistance specs, usually along with spectral reponse, response time and voltage ratings.

Yeah i had checked partexspress and ebay and a few others, it may have been because i called them photocells
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Dylan

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Re: Where do i find photocells that have actual resistance ratings??
« Reply #4 on: September 14, 2009, 01:47:10 AM »
Plug it up to your multimeter and cover it with tape. Then read the S.O.B.
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