giovaniluigi
Member level 1
This seems to be a very basic question, but I'm having certain doubts.
From the picture above you can see 2 configurations to turn on/off a LED.
I would like to know what is the correct/best design, or what is the difference between them, in except of the inversion of the signal...
I'm not sure how I should use, or if both are ok.
I'll use this to drive a LED from an optocoupler at 20Khz.
Which one should I choose for best performance ?
From the picture above you can see 2 configurations to turn on/off a LED.
I would like to know what is the correct/best design, or what is the difference between them, in except of the inversion of the signal...
I'm not sure how I should use, or if both are ok.
I'll use this to drive a LED from an optocoupler at 20Khz.
Which one should I choose for best performance ?