This setting applies to virtually any photo transistor and any operational amplifier. The power supply must be symmetrical, and the gain is determined by the relationship between R2 and R1.
We found this circuit in an 80's Electronic Design. The circuit uses an integrated of the time....
With this circuit (shield) we can control a load from 500 mA to 1 A, depending on the transistor, using a...
The consumption of this circuit is only 50 uA in the standby condition and 4.5 mA when supplying a pulse...