Found in a Popular Electronics from the 90's, this circuit can generate frequencies according to the values of the employed components, according to the table next to the diagram.
Found in English documentation, this circuit uses a thermistor as a sensor. The trigger point is...
The circuit is from the 1990 Motorola Linear Databook. Equivalent operations can be used and what...
We find this circuit in an old documentation, but it can be made using modern transistors. The circuit...