Old 05-16-2011, 07:05 AM #1
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Default help me identify this

to help me practise extracting diodes i have been pulling apart any old cd / dvd drive i can find in the shed. 99% of them dont work

and i opened up a creative 24x cd-rom and i found this and i cant for the life of me figure out what kinda diode it is






i also found this curious little diode.
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help me identify this-img_0297.jpg   help me identify this-img_0298.jpg   help me identify this-img_0300.jpg  


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Old 05-16-2011, 08:02 AM #2
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Default Re: help me identify this

how big is that part the round one and is that a light pipe comming out of the top of it ? , the flat one is a laser diode .
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Old 05-16-2011, 08:18 AM #3
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Default Re: help me identify this

The top one could be an optical sensor. Just guessing. I've never heard of 2 diodes in a CD rom.
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Old 05-16-2011, 08:37 AM #4
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Default Re: help me identify this

the bottom one was from a different cd rom.

the large diode is a 9mm. but why does it have so many pins
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Old 05-16-2011, 10:05 AM #5
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Default Re: help me identify this

There are many reasons it has that many leads, originaly many things came in that can other than laser diodes there could of been op amps and many different amplifiers back then it's old tech.
the reason it would have that many leads as a laser diode is it could have a sens diode in the can also to send feed back to the driver, heater or cooler to keep the diode at a certin temp, more than one laser diode inside the package, many different reasons for that many leads
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Old 05-16-2011, 11:15 AM #6
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Default Re: help me identify this

cheers for that info pyro.
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Old 05-16-2011, 03:04 PM #7
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Default Re: help me identify this

Might be the diode and pickup in one component.
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