Found in 90s Popular Electronics, this circuit uses common general-purpose transistors in a configuration that has been extensively explored on this site and in our articles.
This circuit is more sensitive than the previous one, in the sense that we can use weaker and more...
This 3-transistor timer was found in the January 1994 issue of Electronics Now magazine. The...
This circuit appears in other articles in this section, but it is very interesting. It is a...