Binary Up Counter Circuit with working animation and simulation video

Here we are going to discuss about an Asynchronous 4 Bit Binary Up Counter, a circuit made up of several J-K flip-flops cascaded to generate four bits counting sequence. An up counter is basically a digital counting circuit which counts up in an incremental mode. Here we have given the simple counting circuit setup using 4 flip flops and a simulation video for better understanding.

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Ring Counter Circuit Working Principle with Animation and Video

Digital counters have several applications in electronics circuits. Counters in digital electronics are used at different situations. Here we are going to deliver the idea of a Ring counter circuit, which is a register counter. Working animation and circuit simulation video of ring counter are also given along with this article. A ring counter is formed by feeding the output of a shift register to its own input.

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Johnson digital counter circuit diagram using D flip flop 7474 (3 bit/4 bit) with animation/ simulation

The Johnson digital counter or Twisted Ring Counter is a synchronous shift register with feedback from the inverted output (Q’) of the last flip-flop. Q’ of the last flip flop is connected back to the input D of the first flip-flop. This inversion of Q before it is fed back to input D causes the counter to "count" in a special way. Animation/ simulation of this Johnson counter circuit is also given in this article.You can create simple dancing LED effects using this synchronous Johnson digital counter .The main benefit of this type of counter is that it only needs half the number of flip flops compared to that of standard ring counter to represent many states. So an n-stage Johnson counter givies a sequence of 2n different states and can therefore be treated as a "Mod 2n counter" whereas an n-stage ring counter has only n states that is "Mod n counter".

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