Fourth-Order High Pass Filter 741 (CB25597E)

This 100 Hz filter was found in the August 1993 issue of Electronics Now. The components can be modified to operate at other frequencies.

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Morse 555 Oscillator (CB26325E)
This circuit found on a William Sheets can be used with a headphone or external amplifier. The...
Audio generator 741 (CB8650E)
In the figure we have the circuit of a complete audio generator using the 741. The circuit was found...
Timing circuit 4046 (CB24997E)
This monostable multivibrator with signals in phase opposition was found in October 1986 Radio...