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Alternating_flasher_using_an_LM3909_chip

2017-02-04 10:57  
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Alternating_flasher_using_an_LM3909_chip
Alternating flasher using an LM3909 chip. Circuitry inside the dashes is the LM3909. This circuit is a relaxation oscillator flashing two LEDs sequentially. With a 12-volt DC supply the repetition rate is about 2.5 hertz (courtesy National Semiconductor Corporation).