This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This voltage-controlled oscillator generates signals from 0 to 1.4 kHz with the components...
This circuit is from a 1982 publication. It is a sequential effect of accelerated LEDs. The...
This common operational configuration can be implemented with modern equivalent. Next to the...