Found in a 90s Electronic Design, this circuit can provide a relatively high-power output. The basic frequency is given by resistors and capacitors without values.
The integrated circuit used in this project is not common today, but it can be implemented with more...
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This current meter with many scales was found in a 80s American documentation. The operational amplifier...