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.
Found in old English documentation, this circuit simulates a diac and can be used to trigger...
This circuit was obtained from a Radio Electronics from October 1963. The 4 transistors must be...
This didactic circuit was found in a 2001 documentation. It presents the result of programming in binary...