This circuit is from 1964 documentation but can be easily implemented based on current components. Input waveforms and detection are shown next to the diagram.
The CMOS TLC555 [equivalent to the bipolar 555] can be used as a monostable in the configuration...
This unijunction relaxation oscillator can be used as a very useful signal injector. The circuit is...
A low frequency or audio frequency generator is an almost indispensable instrument in which it...