This conventional double time constant circuit was found in an American documentation from the 90's. The triac must be according to the motor controlled.
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...
This circuit has no lock, but it has a very low consumption feature in the standby condition. We...
This is the typical circuit of a local oscillator for a superheterodyne FM receiver. The circuit...