I have built the following circuit and it outputs 0 although the final OR gate takes in inputs of 0,1,0. The light green indicates a 1, yet the final output is 0 and I'm not sure why. All the wires are connect, but maybe that middle light-green one something is wrong?

enter image description here

  • 2
    \$\begingroup\$ It doesn't look like your middle input is connected. Moreover, I suspect that this gate is 2-input only. And your top AND gate is 3-input with one input floating, which is not adding clarity. \$\endgroup\$ – Eugene Sh. Jan 24 at 18:51
  • \$\begingroup\$ @Eugene I don't think for the AND gate it matters, I've built circuits using Logism in the past and it still works fine. Its just that the OR gate has problems working with 3 inputs. \$\endgroup\$ – PeraltaLearns Jan 24 at 18:56
  • \$\begingroup\$ Have you read my whole comment? \$\endgroup\$ – Eugene Sh. Jan 24 at 18:56
  • \$\begingroup\$ Are your certain that the middle input of the OR is connected. According to the fig, the line slightly overlaps the symbol and does not seem connected. \$\endgroup\$ – Alain Merigot Jan 25 at 8:20

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