My goal is to use the OPT101 chip combined with a 650nm laser for a "trip wire" going to an input on a micrologix plc. I have been having some issues getting an output voltage from the chip. I have the chip connected as follows.
+Vs of 12v to pin 1(Vs)
-Vs to pin 3(-Vs)
jumper from pin 4(1M ohm feedback) to pin 5(output)
volt meter across pins 8(common) and 5(output). (the meter only reads .4v when laser is shining or .2v without it.)
If i jumper pin 8(common) to pin 3(-Vs) since they are both my "ground" i get the full 12v on the voltmeter regardless of the laser shining or not.
any help would be appreciated. I am at a stand still.
Thanks,
Tim.
+Vs of 12v to pin 1(Vs)
-Vs to pin 3(-Vs)
jumper from pin 4(1M ohm feedback) to pin 5(output)
volt meter across pins 8(common) and 5(output). (the meter only reads .4v when laser is shining or .2v without it.)
If i jumper pin 8(common) to pin 3(-Vs) since they are both my "ground" i get the full 12v on the voltmeter regardless of the laser shining or not.
any help would be appreciated. I am at a stand still.
Thanks,
Tim.