I was playing around with my opamp and an led being used as a voltage soure for my op amp, and I was just curious what the output impedance of the led would be, under bright light there's no problem with it but when its dim, my multimeter was too much load, and then I realized my oscope was actually…

output impedance of led?

Grumpy_Mike May 22, 2012, 3:02am 7

You can get digitally controlled op amps

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