This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics magazine from February 1989.
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...