This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies to virtually any junction FET.
The range of generated signals depends on coil L1. The circuit was found in old English...
This circuit was suggested by Electronic Engineering in a 1980s publication. The circuit makes use...
This automotive tachometer circuit uses a FET and a 1 mA full-scale instrument. We found it in the...