# The Binary Curta

It is my believe that the Curta could have survived the digital age.
Using the standard parts with only minor modification a Binary Curta was well within reach.

This is how it could have looked...

## Limitations of the Binary Curta

### Accuracy

This model is base on the Type I Curta.
It inherits the number of (binary) digits:

item | digits | range (bin) | range (decimal) | remarks
--- | --- | --- | --- | ---
settings | 8 | 00000000 .. 11111111 | 0 .. 255 |
results | 11 | 00000000000 .. 11111111111 | 0 ... 2047 |
turns counter | 6 | 000000 .. 111111 | 0 .. 63 |

## Some notes on the construction

### The Setters and wheels

These parts are easy: just a shorter version of the decimal setters.
The wheels are only engraved with 0 and 1.
In fact any surplus wheels with 0 to 9 engraved could have been use too!

### The Step Drum for the Adder

No need for many teeth here...

### The Step Drum for the Turns Counter

No need for many teeth here...

### The carry lever actuating pins on the back of the results wheels

To keep the design simple there are 5 carry lever actuating pins on the rear of the results wheels.
This way the result wheels can just keep rotating.
When clearing the wheel it is however forced in a fixed zero-position, and may well show a zero a few times.

Complicated? No because it uses the standard decimal wheels with only a few pins added and different engraving.