The integrated circuit used in this circuit from a 1987 documentation is no longer common today. This circuit can generate a multitude of different sounds and this circuit is an example of application.
August 2016 - It can be obtained from Mouser Electronics new operational amplifiers with extremely low...
In the figure we have a security system consisting of a sophisticated alarm found in a 90s edition...
In the figure we show an application in which the 4093 excites a stage with 4 transistors in the...