This circuit was found in an ancient American documentation. The power supply is not given, but we have the voltages used. The relay is sensitive type for high voltage.
This circuit can be found in a 1970 Motorola documentation. The circuit can be implemented with general...
This circuit generates sinusoidal and cosine signals of 2 kHz given basically by the values of C1...
This circuit of a 1991 PE Hobbyst Handbook allows the brightness of the incandescent lamp to be...