# Synchronous Sequential Circuit 0 2 1 3 0 in tinkercad

#### KosmasTala

Joined May 30, 2022
5
Please if you want help me to make a Synchronous Sequential Circuit 0 2 1 3 0 in tinkercad with two leds.
based in this picture

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#### MrChips

Joined Oct 2, 2009
30,432
Remove the direct connections to the LEDs.
Drive LEDs from a buffer gate instead. Add current limiting resistor in series with the LED.

#### KosmasTala

Joined May 30, 2022
5
Remove the direct connections to the LEDs.
Drive LEDs from a buffer gate instead. Add current limiting resistor in series with the LED.
if someone will design this circuit in tinkercad I will appreciate it

#### KosmasTala

Joined May 30, 2022
5
if someone will design this circuit in tinkercad I will appreciate it
thanks btw

#### dl324

Joined Mar 30, 2015
16,654
if someone will design this circuit in tinkercad I will appreciate it
Is this school work?

#### KosmasTala

Joined May 30, 2022
5
YES

#### dl324

Joined Mar 30, 2015
16,654
You need to show us your work.

It doesn't appear that the counter you've wired will count in the sequence you desire. I'll provide feedback after I see your work.

#### KosmasTala

Joined May 30, 2022
5

#### MrChips

Joined Oct 2, 2009
30,432
Two cascaded T-type flip-flops will count in the normal binary sequence:
0 - 1 - 2 - 3 - 0
i.e.
00 - 01 - 10 - 11 - 00

00 - 10 - 01 - 11 - 00

What can you observe about the difference between these two sequences?

#### dl324

Joined Mar 30, 2015
16,654
I think it's a matter of sloppy work.

If you assume that the first flip flop is the most significant bit and the second is the least significant, then it counts in the desired 0-2-1-3 sequence. If you assume the first flip flop is the least significant bit, which would be more typical, it counts 0-1-2-3.