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 interesting circuit of a 1988 documentation consists of a mouse trap where the sensor is left to...
Using an operational amplifier, this circuit was found in the March 1996 issue of Electronics Now...
Found in a 1980s documentation, this circuit makes use of components from that time. Modern...