The power supply for this 1972 circuit must be symmetrical and the BC549 transistors. Care with the layout is important to avoid capturing tinnitus.
This circuit makes simultaneous control of two up to 150 W incandescent lamps. The circuit is half wave...
This freezer alarm was found in a 1980s American documentation. The circuit uses a reed switch and...
The cut-off frequency of the circuit shown in the figure is 750 Hz, with the components used. The...