In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
This circuit was found in the March 1980 issue of Radio Electronics magazine. It is based on the...
This circuit (2009) has driver control through the RTS signal or in automatic mode through the...
This monotone alarm oscillator circuit was found in July 1975 Radio Electronics magazine. Power is...