This circuit is from a Radio Electronics from April 1964. The circuit uses power transistors of the time, which must be mounted on a good heat radiator. Modern equivalents can be used.
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. |...