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Recent content by harshil4

  1. H

    999 counter problems- help please?

    hi, thanks for you reply! can you help me finally furthermore? on the SNLS47N where do LT, BI/RBO and RBI go to? +ve? also, on the 74HC193N, does PL go to positive- is that nPL? finally, do the inputs on the 74HC193N that are not needed (D0,D1,D2,D3) remain unconnected? ive tried a lot and...
  2. H

    999 counter problems- help please?

    Hi there, im having problems. im trying to create a 999 counter and i have a 74LS47 BCD to 7 Seg decoder microchip and a 74HC193 Up/Down Counter. for some reason, it just doesnt work! nothing happens whatsoever.. Can anyone help me? This is for my electronics GCSE courseowrk, and i am absolutely...
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