In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
This timer circuit was found in a 1980s American documentation. Transistors and SCR support modern...
This circuit was found in European documentation from the 1980s. The unijunction may be 2N2646 and the...
The circuit shown in the figure is suggested by AllegroMicro (www.allegromicro.com) and consists of an...