We found this circuit in GE's 1977 transistors manual. Transistors admit equivalents according to the desired current at the output.
Found in the Encyclopedia of Electronic Circuits volume 5 from 1995, this circuit uses a...
The lighting sequence of the LEDs on this circuit, found in a 2001 documentation, is determined by the...
This circuit was obtained in an old 1983 magazine, but it can still be easily assembled. The...