This amplifier was obtained from an Electronics Now from the 90s. The circuit has a dual 26V power supply. Power integrated circuits must be equipped with good heat sinks.
This sensitive two-transistor circuit was found in the June 1965 Radio Electronics magazine. The...
This circuit, obtained in an old publication, causes a second telephone bell to be played in a...
Found in a1969’s neon lamp documentation, this circuit uses a high voltage transistor. The output...