ring-counter

Ring Counters

This contains two ring counters implemented using Latches and pcb!. This is designed using this wikipedia page.

• One Hot Ring Counter / Straight Ring Counter Image taken from Wikimedia commons.

  This sets a pattern of 1000 and rotates it.

  • This needs 4 D latches as seen from the diagram
  • exposes e (enable), r (reset), q1-q4 (output) pins
  • to reset back to 1000, set e to false, set r to true for one tick
  • after that each 3 ticks with e set to true will shift 1 by 1 position

• Johnson's Ring Counter / Twisted Ring Counter Image taken from Wikimedia commons. This changes pattern of 0000 to 1111 and back to 0000

  • This needs 4 D latches as seen from the diagram
  • exposes e (enable), r (reset), q1-q4 (output) pins
  • to reset back to 0000, set e to false, set r to true for one tick
  • after that each 3 ticks with e set to true will shift the pattern to next state