Found in US documentation, this circuit changes the waveform and phase of a sine signal. The circuit is indicated for frequencies between 0.1 and 10 Hz. The power source must be symmetrical.
This preamplifier for high impedance microphone is designed to make a good addition to the speaked word...
This LED indicator circuit uses an LM339 comparator. The circuit was found in the January 1995...
This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a...