I agree with John. This thing is made to interface directly. No external resistor needed. Just one wire.Wire the NPN current-sinking output directly to an Arduino input pin, with the internal pull-up on.
Looks like the NPN (current sinking/Open Collector) output of the light sensor (White wire) is TTL compatible. Just turn on the internal pull-up resistor and connect the Open Collector output of the light sensor directly to the Arduino pin. Connect the - side of the power (Blue wire) to Arduino ground.
Does, "(NPN output) less than 200 millivolts at 10 mA and less than 1 volt at 150 mA" mean that should my device draw 150mA (which the Arduino cannot do)
I figured that the 222mA should be more than enough to both power the Arduino and the ethernet shield, but what do you guys/girls think?
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16