This 1980s documentation circuit uses a 741 in a different high-speed comparator configuration. The feed must be symmetrical. The diode is general-purpose.
This SCR relaxation oscillator was found in old documentation. The SCR can be TIC106 and the...
The oscillator shown in the figure generates a 1 kHz tone that is reproduced on the speaker with...
Suggested by an Electronics Now magazine from April 1994, these circuits can be used as output...