This 1968 Hughes circuit uses period components and operates at 8 Hz. Current equivalent components may be employed. Note the high supply voltage.
This simple circuit with SCR and unijunction transistor appeared in Radio Electronics magazine in July...
With this circuit, using a single control voltage, you can increase the brightness of the lamp...
This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is...