This circuit was found in a Radio Electronics from February 1966. The circuit operates with a common battery and the frequency is given by the resonant LC circuit.
This simple 80's CMOS game was found in an English magazine of the time. It appears elsewhere on this...
This circuit uses as an indicator a common micrometer type VU with 200 uA of full-scale current. The...
This circuit was found in ancient American documentation. Diodes are general-purpose types. |...