This is the analog part of the previous circuit with the pressure sensor for the altimeter. The circuit is from a Radio Electronics from October 1990.
In fact, this circuit found in a Radio Electronics from November 1964 is a high voltage generator whose...
This configuration was found in old documentation and is valid for most general purpose NPN...
This is the project found in a 1981 publication, but it is still viable. It is a simple AM...