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Tom McCurdy

7-Segment LED Counter (binary and base 10)

Here is something that I was able to build, it basically takes the pulse from a 555 timer and goes

  1. Tom McCurdy
    Here is something that I was able to build, it basically takes the pulse from a 555 timer and goes through a 7490 divide by 10 into a 7448 and finally into a LN514rk Common Cathode LED-- if you are going to use a common anode LED just replace the 7448 with a 7447

    Materials Needed

    • 5 V-Source
      Wires
      555-Integrated Circuit
      7490-Integrated Circuit
      7448-Integrated Circuit
      7-Segment Display (the one I used was LN514RK)

    Simply connect it as it is in the diagram
    http://www.quantumninja.com/hw/elec/circuitdone.jpg