# How To Make an Analog Computer

Analog computers are centuries old computers and have been employed for doing various calculations.
An analog computer is typically used for analyzing complex mathematical problems. The process involved for analysis is mechanical in nature. A simple example is the astrolabe that was invented in the second century BC to perform astronomical calculations. In modern times, an analog computer is used for doing various calculations including basic counting to sophisticated electrical calculations. -An analog computer is easy to build and be used at home for speedy results to different mathematical problems.

### To Build An Analog Computer You Will Require:

•    A medium-sized saw
•    2 wooden rulers
•    Black marker
•    Red marker

### Build Analog Computer in Five Easy Steps

1.    Take two wooden rulers (without any metallic adornments) and cut two inches from each ruler with help of saw. Reconstruct the numbers on the inch scale by putting a decimal point in front of the numbers. Do this for both the scales.

2.    To build the logarithm scale one has to calculate the base-10 logarithm of every integer between 2 and 9. Locate the integer in its proper place on the ruler and with the help of black marker assign the correct divisions. A point in case; 2 will be equivalent to .30103, 3 will equal .47712 and so on and so forth.

3.    Next, begin the calculation for integers between 11 and 99 using the base-10 logarithm. Do not take into consideration the position (or the first inch) established before the first decimal point described in Step 1. Use the red marker to establish the correct points on the ruler. So, 11 will be equal to (1).04139, 12 will be (1).07918 and so on.

4.    To mark every additional level, you will have to give up one more part of the logarithm. Hence for the third level you will have to remove 2 and for the fourth level you will get rid of 3. This will continue for as long as you don’t reach your goal. Use red and black markers to distinguish between each level.

5.    Once you have made the points in the first ruler, simply replicate them on the second ruler. Place both the rulers in such a manner that long side of one ruler is over the long side of the other. You will find it easy to multiply numbers by directly counting the complementing numbers of the logarithm.

The analog computer can easily and effectively give the right answers for various calculations including those dealing with differential equation. Although the analog computers are not as accurate as digital computers, they can speedily decipher extremely difficult equations.

The computers are designed to solve the entire problem at once. This allows for change in frequency as well as the configuration of the function and calculations being performed. This might cause a slight delay in the finding of the new solution. But the delay is most negligible and doesn’t effect the solution in any way.

Despite some of the disadvantages that analog computer has, it is still the best way for replicating the physical aspects of the real world.