This circuit is from the 1983 Intersil Databook. The display is plasma and must be excited by a high voltage circuit. The components used in this configuration are not common today.
This circuit is from a 1991 publication. The integrated circuit used is an integrated radio from...
This receiver for listening to the TR-23 phone was manufactured in Japan in the 1960s. The circuit is...
Found on a 1965 Radio Electronics, this circuit fires a signal xenon lamp applied to the SCR from...