This circuit uses the LM2931 which is not a common component today. What it does is to activate a lamp causing it to blink at a frequency determined by the capacitor.
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This circuit provides two outputs of the same signal. One with the original phase and the other...
This is an old circuit, from 1997, when cathode ray kinescopes were still used in televisions. This...
This simple circuit was suggested by the Electronics Handbook Volume XIII 1993. LED D1 emits light for...