The cut-off frequency of the circuit shown in the figure is 750 Hz, with the components used. The circuit applies to almost any operational amplifier and the power supply must be symmetrical.
This circuit was found in a Popular Electronics from the 90s. The frequency is given by R2 and C1....
High performance 16 A Buck regulators capable of operating at 2.7 to 4.8 V voltages and 0.25 to...
This configuration triggers an external circuit or simply an LED for time given by R1 and C1 (T =...