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, found in a 2000 documentation, is used in simple artificial intelligence and robotic...
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...
The oscillator of the figure has its frequency determined by the crystal. The indicated value is...