This circuit was found in a 1969 US documentation. It provides a signal that can be externally programmed as suggested circuits. The circuit can be used as a shield.
We found this circuit in an English publication in 1982, but it can still be easily assembled by...
This circuit was obtained in a 1967 General Electric documentation. It alternately fires two xenon...
This is a traditional flasher configuration with two neon lamps. The frequency is given by the 100 nF...