Big Johnson Counter

333

01:48:31

Ugh, epilipsy warning!!

Please comment for corrections!

A Johnson counter implemented with D-Flip flops.  It's a type of register that back-feeds Q'(0) into D(3).

I guess this is how you get a semi-random pattern for a technical looking display for a 50s sci-fi movie.  Blinking lights everywhere!

555 Timer = Clk

Primary states are

0000->1000->0100->0010->0001

Output for the LEDs seem to be

0000->0010->0011->1011->1111->
        ->1101->1100->0100->0000

In my textbook, I saw a 3 D-Flip-Flop with a state of:
     101<-->010
for the secondary state.

In the four D-Flipflop version, the secondary state is: 
    0000->
     ->0001->1010->0111->
                        ->1001->1110->0101->
                              ->1000->0110->0001
                                    back to 0001

Adjust bottom counter and top counter (R2+R1) to increase period by increasing ohmage.  Adjust top counter (R1) to increase on-time top counter.

To EveryCircuit Peeps: Need Moar Space :P

published 10 years ago

roops1967

10 years ago

You got me interested :)

faceblast

10 years ago

big johnson heheheheh

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