This 6W amplifier with 4 tubes was indicated in an American documentation from 1947 to operate with recorders. The circuit uses a source with a transformer.
This circuit uses a PLL4046 oscillator to excite a piezoelectric ceramic. The circuit is from an...
This circuit already explored in several diagrams in this section was found in a 90’s Popular...
This logic probe or logic level indicator is suitable for use in CMOS circuits. The power comes...