Analog computer - calculator -

336

03:03:00

I'll just explain few facts about analog computers (however you can find more on Wikipedia) : 
1. It work on mathematical/ physical formulas (for example Ohms law)
2. It is really easy and helpful to create one.
3. It can calculate much faster than digital. 
4. Reason why we are using digital instead of analog is because, it is really hard to get for example potentiometer or voltmeter with accuracy about 0,000000000001% to count high number equations like 10000000000 - 5456937.

My computer is simply working on voltage difference ( 30V - 20V = 10V)
This way u can easily subtract numbers.

- The orange line is the number from which we want to subtract. 
(x - 20 = 10)
- The green one is the subtractor
(30 - x = 10)
- The blue line is the result.
(30 - 20 = x)

  

published 9 years ago

wyoelk

9 years ago

Very slick indeed!

nikisalli

9 years ago

Nice but say me how do you count? Because counting is one of the most important things in computers and if you make an analog binary counter it becomes digital so no complex analogic computers!

Matus

9 years ago

Ok, to answer in order: This circuit is counting on physical laws - voltage difference. It's easier to build than describe. I can't describe it further physically , but It's easier to do it in mathematics. Let's say the potentiometers are two resistors with changeable resistance. We will call the top ones R1 and R3 and the lower ones R2 and R4. To count the voltage measured between these two resistor dividers we use voltage divider formula Udiv = (R2/(R1+R2))* Uin We have two voltage dividers and we want to subtract them ,so the formula will look like this: U = ((R2/(R1+R2))*Uin) - ((R4/(R3+R4))*Uin) I know that it looks weird, but It work. You also need to change the parenthesis, because the value of voltage will be negative. So finally it will look like this: ((80/(20+80))*100) - ((70/(30+70))*100) = 10V And also it is possible to create complex computer - only problem will be the weight... Hope this help

pajaka

9 years ago

Those are indeed two dividers with voltmeter in diagonal. But Niki meant counting, like adding 1 each step or incrementing.

nikisalli

9 years ago

I meant that you can't count because any step from 0 to 1 mames something digital so no clocks for analog things onlyinear circuits

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