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Tags: D flip-flop

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T flip-flop using D flip-flop

T flip-flop using D flip-flop

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2-bit counter, limited to 3 numbers (0,1,2)

2-bit counter, limited to 3 numbers (0,1,2)

This is a 2-bit counter.  2-bit counters normally can count 4 numbers: 0, 1, 2, 3. However, this circuit counts up to 2 and resets at 3.  This can be scaled by adding more D flip-flops and setting the And gate at the location you want the count to stop at.  You can also set a starting number in a similar fashion.  This can be modified to a synchronous 2-bit counter using JK flip flops.


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Gray Code Up Counter

Gray Code Up Counter

Multiple variations of a 3-bit gray code up counter.
JK -> D -> D using NAND -> Decoder to Display

EDIT: Added BCD-to-7-Segment Sub Circuit


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Flip-flop Equivalent

Flip-flop Equivalent

A way in which the JK flip-flop can be made into a D flip-flop and vise versa.