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.
This circuit is from an American magazine that no longer exists, Modern Electronics, in a February...
March 2017 - The new Texas Instruments TPA3244 class D amplifiers with power ratings from 60 to...
This preamplifier is intended for the use with magnetic pick-ups. Power supply must have voltages...