This circuit was published in the December 1987 Radio Electronics magazine. It uses two 555s to drive 6 flashing LEDs.
This circuit with 1% regulation aims at replacing mercury cells. We found it in a 1967...
Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The...
This basic voltage comparator circuit has a reference voltage given by a zener diode. The input...