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.
The circuit shown in the figure is suggested by Maxim (www.maxim-ic.com) and makes use of the...
This 100 kHz crystal oscillator uses 7404 to generate square signals. We found it in a Popular...
We found this time base circuit in a timer project from the August 1972 Radio Electronics...