This circuit was found in a National Semiconductor manual from the 1980s. The operational amplifier is from that time and the waveforms are shown in the diagram.
This configuration, which requires a symmetrical power supply for the 741, can be implemented with other...
This timer with two unijunction transistors and one SCR was found in an American documentation from 1964....
This simple metronome, from 1985 documentation uses only transistors and has two settings. For...