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4-bit Adder

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Author: phunbox1 (RBS)

Group: phunbox1

Filesize: 434.26 kB

Date added: 2008-10-26

Rating: 8.1

Downloads: 1169

Views: 2189

Comments: 20

Ratings: 47

Times favored: 0

Made with: Phun


Scene tag

This is a complete 4-bit adder. It is a machine that will take two 4 digit binary numbers and add them together. It uses simplified versions of my logic gates that are powered by gravity.

Here`s how to work it:

At the top of the machine you`ll see A + B = S. A and B are the numbers you need to set so the adder can find their sum.

Just below the equation you`ll see places to input values for A and B. You use the black and white circles on the orange platforms as input.

Black ball/circle = 1 = true
White ball/circle = 0 = false

Set A or B to a value by putting either a black or white ball in their 8, 4, 2, or 1 slots. The sum of the slot values that black balls are in is the decimal value of your input.

For example, if you wanted to set A to 5:
Put a white circle in slot 8.
Put a black circle in slot 4.
Put a white circle in slot 2.
Put a black circle in slot 1.

The sum of the slot values where black circles are set is 4 + 1 or 5.

The machine will not work properly unless all eight slots have exactly one ball of either color in them.

After that you simply press play and watch it work (may take a while.)

The solution or sum S is at the very bottom of the scene. All of its slots should be filled with a black or white circle. To find the value of the sum add up all the slot values where black balls have landed.

Some possible bugs are:
Balls bouncing unexpectedly in the wrong place.
Balls hitting each other in places they need to cross paths.

Please do not rate this low if you do not understand how to use it. I tried to make the instructions very clear but I will gladly explain more if needed.

Hope you enjoy it!:)
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Title: 4-Bit Adder with pens
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I started off with 15 at the top and ended up with 16 at the bottom. Regardless this is absoulutley amazing. You have began to teach me binary with this contraption.:)
Im sorry. I guess I did start off with 16 at top. This is amazing.
Yeah playing with this is a good way to learn binary.

Could you tell me the values of A and B you put in to get 16 instead of 15. I'd like to fix any bugs if possible.

lol Ok nevermind.:P
One word: WOW!! :D :D :D :D :D
Great job!
make an 8 bit adder using hilarity_ensue's logic gate pl0xzorz
Good,but when i put circles some of them just fall down.BTW why a+b=s instead of a+b=c?
Oops sorry, I didn't read sum:).
And i was wrong about falling circles,the machine works great,but it's sooo slow.Maybe that's fault of my slow eee pc.Awsum! 5/5
i made a lightning shootind car you should realy see it
this is pretty much how electronic computers work, exept they use electricity instead of white and black balls. Anyway it is very cool, 5/5
What's wrong Jimmy?
wow!cool contraption! brainmelting thing!!!xD
cool 5 of 5
Very good contraption!
very good, next i want to see you divide:P
For those of you who don't understand - White is false. So if you put it into slot eight, for example, eight wont be included. If A has to black balls in 4 and 2, it totals 6. If B has black balls in 4 and 1, it totals 5. So the equation is 6+5. The whites must be in the unused slots, so it can work properly. The same applies for S. A black ball should be in 8, 2, and 1. That totals 11. A white ball should take up the unoccupied space. So the equation is 6+5=11. Understand?
Correction - If A has TWO not to sorry
that's insane:o
dang... thats complex
but it definitely gets the job done