Product condition: NewDescription: The suite,adopt a warning lamp circuit NE555 and CD4017 chip simulation to make blue LED and red LED flashing,respectively, according to the pulse adjusting RP1 flicker frequency can be adjusted. Working circuit voltage of DC9-12 v,suite does not contain the power (battery). The suite is easy to make, obvious effect, interesting,suitable for electronic enthusiasts and vocational school students' practical assembly. Package included: 3 x NE555 + CD4017 Double color flashing lights kit
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