Quote:
Originally Posted by Astro
I believe the driven side of the opto is just a led.
So between 4 and 20mA normally.
Someone correct me if this is wrong.
|
Yup, that's right. It would be nice if it only took 20mA to fully trigger, as the Arduino can do 40mA per pin max output. If it takes more than 40mA I will have to amplify the signal with a transistor.