This simple signal generator with transistors was published in Radio Electronics magazine in November 1957. The circuit generates signals determined by the coil and modulation by the transformer.
Found in a 90s Popular Electronics, this circuit is based on a uA739, an unusual component today....
This circuit is from a 1982 publication. It is a sequential effect of accelerated LEDs. The...
In the figure we have more circuit that makes use of transistors and that has excellent...