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I built a 2 bit up counter without any enable. I am manually controlling the clock

Moore and Mealy machines detection the binary sequence 01.

Encoding states: one-hot.

Counters and timing signal generators discussed in the Computer Science and Computer Architectures [CSCA] course at the University of Applied Sciences CAMPUS 02, Graz, Austria.

The project features the following circuits:

• Sample 2-Bit Counter - a simple counter exploratory developed by students during the lectures.
  
• Sample 2-Bit Counter with Timing Signals - that simple counter extended with decoder to provide timing signals.
• 2-Bit Switch-Tail Ring Counter - developed by using D flip-flops.
• 2-Bit Johnson Counter - developed by extending the 2-Bit Switch-Tail Ring Counter with decoder to provide timing signals.
• 4-Bit Switch-Tail Ring Counter - developed by extending the 2-Bit Switch-Tail Ring Counter with two more D flip-flops. [learn more (see chapters at the bottom of the page)]
• 4-Bit Johnson Counter - developed by extending the 4-Bit Switch-Tail Ring Counter with decoder to provide timing signals. [learn more (see chapters at the bottom of the page)]

Registers and memory elements discussed in the Computer Science and Computer Architectures [CSCA] course at the University of Applied Sciences CAMPUS 02, Graz, Austria.

The project features the following circuits:

• 4-Bit Register - developed by using D flip-flops.
• 4-Bit Register (Enabling the Clock Signal) - 4-Bit Register with enabling of the register implemented via enabling of the clock signal.
• 4x4-Bit Memory - with read and write access and reading buffer set to zeros in case of writing.
• Tri-State Buffers - explains the tri-state buffer element.
• Mutually Exclusive Tri-State Buffers - demonstrates how to use tri-state buffers to mutually exclude parts of a circuit.
  
• 4x4-Bit Memory with Tri-State Buffers - developed by extending the 4x4-Bit Memory with Tri-state buffers to cut of the reading buffer in case of writing.
• 4x4-Bit Memory with MAR and MDR - developed by extending the 4x4-Bit Memory with Tri-State Buffers with the Memory Address Register (MAR) and Memory Data Register (MDR).
• 4x4-Bit Random Access Memory (RAM) - demonstrates using the built-in RAM element.
• 4x4-Bit Random Access Memory (RAM) with MAR and MDR - demonstrates using the built-in RAM element extended with the Memory Address Register (MAR) and Memory Data Register (MDR).
  

Latches and flip-flops as discussed in the Computer Science and Computer Architectures [CSCA] course at the University of Applied Sciences CAMPUS 02, Graz, Austria.

The project features the following circuits:

• SR Latch - demonstrates the behavior of an SR Latch. [learn more]
• Clock - demonstrates the Clock Signal. [learn more]
  
• Clocked SR Latch - developed by bringing the Clock Signal to the SR Latch. [learn more]
• D Latch - demonstrates the behavior of a D Latch. [learn more]
• Clocked D Latch - developed by bringing the Clock Signal to the D Latch. [learn more]