This analog volt-ammeter was found in an Electronics World of 1968. It makes use of a 0-1 mA analog milliammeter. Accuracy depends on the components.
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...