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12_volt_two_wire_automotive_flasher_using_an_LM3909_chip

2017-02-04 14:57  
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12_volt_two_wire_automotive_flasher_using_an_LM3909_chip
12-volt two-wire automotive flasher using an LM3909 chip. Circuitry inside dashes is the LM3909. Rate is about 1 hertz. Since it is a two-wire circuit it can be adapted for either negative or positive ground systems. In positive ground systems place the lamp between the common and the negative battery terminal (courtesy National Semiconductor Corporation).