This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
This circuit was found in a 1966 EEE. What it does is it converts the logic levels of 0 V and +4 V...
This circuit is from a 1976 documentation. It makes use of isolated gate MOSFET which is already very...
This interesting effect circuit was found in a 1982 publication. The sequence of musical notes is...