6 V x 5 mA regulator (CB21537E)

This 6V regulator with FET was found in an old Electronic Design. FET and transistor admit modern equivalents.

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...