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Two alternating flashing LED light controlled by digital IC

2017-02-04 19:15  
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Two alternating flashing LED light controlled by digital IC
The chart shows the TTL or CMOS digital integrated circuits controlling circuit, and it uses the transistor to drive two LED lights flashing alternately. Different supply voltage can be used to change the R's value and the VD3 ​​regulation to meet the alternately flashing requirements.