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Which IR LED?
Which IR LED?
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Old 15th November 2012, 02:32 PM   #11
MartinR is offline MartinR  Germany
diyAudio Member
Join Date: Apr 2005
Location: Frankfurt

the 5594 seems to work well. I have -1.3V and 40mA. Gain is 9 percent lower as with the cathode RC. That seems not bad because a 1R5 unbypassed is already causing a 20 percent reduction.

Kind regards,
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Old 15th November 2012, 04:35 PM   #12
dgta is offline dgta  United States
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Join Date: May 2011
Originally Posted by SY View Post
the HLMP6000 series are very quiet and low impedance.
Resistor Lamps
The HLMP-6xxx Series 5 volt
subminiature lamps with built in
current limiting resistors are for
use in applications where space
is at a premium.

I don't think you want a resistor in there, perhaps that's not the one you meant.
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Old 15th November 2012, 05:07 PM   #13
SY is offline SY  United States
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Location: Chicagoland
Which IR LED?
HLMP-6000 Avago Technologies | Mouser
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
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