Recent content by Jack Chappy

  1. J

    Why do the 7 segment LED's not light up in this TTL circuit simulation?

    The circuit has four dipswitches that feed the 7-segment decoder inputs. This enables us to generate a complete truth table as illustrated in the data sheet. I am currently creating EWB labs for my son where he will be simulating RC transistor oscillators driving JK flip-flops and NAND...
  2. J

    Why do the 7 segment LED's not light up in this TTL circuit simulation?

    I gave my 13 year old son a simular lab which seem to work fine. Take a look, this may work for you as well.
  3. J

    Why is my 7 segment display not working in Multisim?

    I home school my 12 year old son. We do an electronic lab every week. This is a working Binary into a 7-segment display EWB circuit. I build this circuit for my son to simulate and to create a truth table. Let me know how it works out for you: Jack
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