This circuit, which appears in other versions on this website, was obtained in old documentation. The load of each PUT depends on its characteristics. The circuit is low frequency.
This very simple 1-transistor oscillator is from Raytheon's transistor manual of the 60s. The...
This circuit is from a 1957 Raytheon transistor manual. The diode can be of general-purpose...
We have in the figure an ultra-simple alarm found in a 1981 publication. As the author indicates, it is...