Power Failure Alarm (CB6116E)

This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a power outage occurs. Time depends on capacitor C1.

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Kinetis L Series of MCUs (COM157E)
November 2016 - Mouser Electronics is indicating in its inventories the new NXP Kinetis L MCUs....
Xenon Pulser (CB25962E)
This xenon lamp circuit, also a stroboscope, was found in the May 1996 issue of Electronics Now...
Synchronized photoelectric switch (CB6864E)
This switch can only be triggered when the mains voltage goes through zero and can operate as a...