# A Nibble And A Half Of Wooden Bits

If you are familiar with binary, what would you need to teach someone who only knows decimal? If you do not know how to count in binary, let us know if the video below the break helps you understand how the base-2 number system works. If learning or counting binary is not what you are interested in, maybe you can appreciate the mechanics involved with making a counter that cycles through all the ones and zeros (links to the video shown below). The mechanism is simple enough. A lever at the corner of each “1” panel is attached off-center, so it hangs when it is upside-down, then falls to the side when it is upright, so it can swivel the adjacent panel.

Perhaps this is a desktop bauble to show off your adeptness at carpentry, or skills with a laser cutter, or 3D printer. No matter what it is made out of, it will not help you get any work done unless you are a teacher who wants to demonstrate the discrete nature of binary. If wood and bits are up your alley, we have a gorgeous binary driftwood clock to feast your eyes on. Meanwhile if analog methods of working digital numbers suit you, we have binary math performed with paper models.

## 8 thoughts on “A Nibble And A Half Of Wooden Bits”

1. Invisible Rainbow Unicorn says:

> Video nicht verfügbar

That’s the third state of a boolean? Not available!

1. bbp says:

Third state of tri-state logic is High-Z/floating

1. SebiR says:

So it’s the fourth state! quad-state! or tetra-strate?

2. RÖB says:

It also demonstrates look ahead carry or fast carry. Well done.

1. default_ex says:

At first I was going to post a comment asking how exactly this is carry look-ahead logic. However it occurred to me when typing that the flap at the top is the generate signal and propagate is implied by the central axis of rotation with the AND between them occuring with the generate flipped and propagate executed. Having built several variations of a carry look-ahead adder among some variations of my own choosing to optimize for specific use cases, I have never seen it so elegantly executed as to be that intuitive.

1. Yes, and also –

The “execute” (digit flip) is falling edge triggered and the “carry AND” (flap) is rising edge triggered.

As any VHDL/Verilog coder would understand the advantage or necessity of.

Some see wood and others see gates.

3. ian 42 says:

put a motor on it and make it bigger! :-)

4. John says:

Clearly the skills in working wood surpass, by several orders of magnitude, his ability to choose music..

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