We found this circuit in a 1967 American documentation. It is a transmitter for animal research, monitoring intestinal pressure. The operating frequency is 22 kHz.
In this phase shift circuit, the transistor can be any general-purpose transistor. The circuit is from...
This simple circuit was obtained from Popular Electronics in December 1990. The magazine no longer...
This circuit was found in an old American documentation. Its purpose is a proportional scanning signal...