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Two LEDs alternately flashing circuit diagram controlled by

2017-02-04 16:40  
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Two LEDs alternately flashing circuit diagram controlled by digital integrated circuit
The circuit shown as the chart is controlled by TTL or CMOS digital integrated circuit, it will flash alternately by the transistor conduction to drive two LED lights. Different supply voltage can change the R and the regulation value of VD3 to meet the requirements of two alternately flashing.