We found this circuit in a French documentation from the 80's. The components used are still common and the circuit can generate signals from 10 Hz to 100 kHz.
This circuit was found in an old Popular Electronics. With it we can check the operation of a...
This circuit is from a documentation from the 90s. The transistor can be any general-purpose FET...
This circuit is from old documentation, but can be easily assembled as components are still...