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SN74HC595: Realized flow lamp

Part Number: SN74HC595

Dear all:

      I want to use the following circuit to achieve the flow light control

Now, however, once the CLK is triggered, the output is all high

Did I make any mistakes?Can you give me some advice to realize the water lamp control?

Thank you!

  • I want to use the following circuit to achieve the flow light control

  • Hello,

    I'm afraid I don't know what a "water lamp control" or a "flow light control" is. It's probably not important to the logic circuit though.

    You must first clear the registers in the device before starting operation. There's a video that shows how to make a power-on-reset pulse located here:

     

    There's also an FAQ about the default starting state of a latched device:

     

    Once the device is properly initialized, and assuming tha tyou have RCLK and SRCLK tied together (there is no junction dot to indicate a connection in your schematic), then every clock pulse after the first will cause the output to increment until the next reset pulse.

    Please let me know if I can be of further assistance.