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.
This circuit generates pulses whose duration determines the position of a remote-control servo. The...
This circuit uses a piezoelectric tweeter to emit a powerful continuous sound above the audible...
This circuit generates sinusoidal signals that depend on the input oscillator. The circuit is from...