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 produces two signals with inverted phases. One is taken for the emitter of Q1 and the...
This circuit is from an Electronic Design of the 90's. The circuit can be implemented with more...
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...