Don't enter the numbers too fast, wait a little bit (about half a second) before sparking the next number. Sparking "Enter" enters the current number, sparking "Clear" clears everything but it does not stop the process if it has already started. Only spark "Clear" if the main computer is not doing anything. "Read Again" only shoots aray through the binary number, it will be useful for computing with the binary number later.
This computer converts any integer up to 9999999999 to binary form. Working with decimal is very complicated for a computer and binary is much simpler, so hopefully some powerful calculators will be possible now. This machine converts by division/remainder. To convert the number 10 to binary, it divides and checks for a remainder. 10/2 is 5, no remainder, so it puts a zero in the binary number first place. For the next step it divides 5 by 2, which is 2 with a remainder. The remainder means it puts a 1 in the next binary space. It then ignores the remainder and divides the last quotient by 2, so it does 2/2 which is 1 with no remainder so it puts a 0 on the next binary place. Then it does 1/2 which is 0 with a remainder so it puts a 1 in the next place. It checks every time if everything is 0 in the decimal place, and when it is that means it is done and it stops. Now it has reached zero in decimal and the binary number is 1 0 1 0. The remainder method is a little confusing, but it isn't magic.
If you're wondering how it divides by 2 and tests for a remainder, that part is slightly determined but it's still really cool. If you have any other questions, feel free to ask.