This circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and a half digits being powered by a voltage of 9 V.
This transistorized siren was found in Popular Electronics from April 1967. The signal must be...
This incandescent bulb stroboscope was found in the February 1974 issue of Radio Electronics...
This is an old circuit with a feature that most modern oscilloscopes have. We found it in a Radio...