modified 4 years ago

SR FF Active LOW

00:26:04

Set the bipole switches to alter the output of the nor gates 

LED represents  logic 1 or 0

      _
       S           Q
       _            _
       R            Q
 _  _        _
 S  R  Q  Q     STATE
  0  1  1  0      SET
  1  1  P  P      NO CHANGE  (P) PREV
  1  0  0  1      Q IS RESET
  0   0  1  1      INVALID 
  1   1   ?  ?    ??  AFTER INVALID  0 0 

published 4 years ago

Malcolm_McGrath

4 years ago

Does anyone know how to add a label

Malcolm_McGrath

4 years ago

centre led will light red if the input values are invalid

Malcolm_McGrath

4 years ago

The circuit is invalid if both switches are open so when first run one of the switches must be closed

Malcolm_McGrath

4 years ago

You can't draw a closed boundary with wires as it causes an invalid circuit so the boundary around the two nand gates has an open switch

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