First we need a little information of binary. Computers have 2 numbers in there system except there not numbers there switches. 1 meaning "ON" (like a light bulb) or 0 meaning "OFF"
On, off, on, on, off, off, on, on
Then the computer interprets that into its numbering system, which later may convert it into ASCII. Correct 8-bit binary only has 8 digits. There are 16, 32, 64, and 128 bit processors that take more numbers than just 8 at a time. This tutorial is for 8-bit.
Paper and Pencil
(optional) Genius to help
Step 1: Preparing
This is the 8-bit binary cheat sheet. Column 8 (the one all the way to the right) is 1, column 7 is just a double of the earlier column, etc.
"Binary Cheat Sheet:
128 - 64 - 32 - 16 - 8 - 4 - 2 - 1"
and pick a number between 1 and 255
My number is 175
Step 2: Analyze the Number
Get your paper and right down your number under your Cheat Sheet.
First does the first number (128) fit in your number? The reason you check this, is because it helps you know if it is a 1 or a 0. Which makes up your number.
128 fits 175
If so subtract your number by the number you checked, then repeat for the rest of the numbers. Also if it did fit that means its a 1 and if it doesn't its a zero. This prepares the number for the next digit in the binary number.
so I'll start over...
175 - 128 = 47 *it fits so its a one* (1 _ _ _ _ _ _ _)
47 - 64 = -17 *Invalid so its a zero* (10 _ _ _ _ _ _)
47 - 32 = 15 *it fits so its a one* (101 _ _ _ _ _)
15 - 16 = -1 *Invalid so its a zero* (1010 _ _ _ _)
15 - 8 = 7 *it fits so its a one* (10101 _ _ _)
7 - 4 = 3 *it fits so its a one* (101011 _ _)
3 - 2 = 1 *it fits so its a one* (1010111 _)
1 - 1 = 0 *it fits so its a one* (10101111)
If you didn't get zero you did something wrong and go back and check your work.
Step 3: There Is Your Binary Number!
Thanks for reading my instructable.