MC3050 is an IC which outputs high when the correct combination is inputed.

Combinations are defined on the third line of the sign, by entering a string of characters. X refers to on, and O refers to off. For example, XOX requires the left and right input to be high.

Sign Lines

  1. COMBO
  2. [MC3050]
  3. The Combination in X’s and O’s. X being on and O being off.
  4. Blank

IC Pins


  • First Input
  • Second Input
  • Third Input


  • High if combination correct


Node Description Default Role Allows creation of the Combination Lock (MC3050) IC. user