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 simple circuit with bipolar transistors is from a 1970s American documentation. The RF...
November 2016 - Mouser Electronics already has the new Microchip MCP1810 Low Dropout (LDO)...
This circuit uses only passive components calculated for the desired frequency. We found it in an...