Pico Calculator

### Pico Calculator

Pico Calculator is a portable mechanical-switches calculator platform powered by the Raspberry Pi Pico. If you are a fan of mechanical keyboards, this is a fun project for you.

The project currently includes two versions:

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#### Pico Calculator

A lightweight and portable version featuring:

- Portable lightweight design
- 1602 I2C LCD
- Beginner-friendly assembly

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#### Pico Calculator Plus

An enhanced desktop-oriented version featuring:

- Larger 1604 I2C LCD display
- 4 utility shortcut function keys:
- Percentage calculation
- Percentage difference calculation
- Customizable currency conversion through firmware (default: USD to BHD)
- Clear functionality
- Independent power management for LCD and key backlighting
- LED key backlighting (optional)

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### Parts Needed

#### Shared Components

##### Controller

- Raspberry Pi Pico

##### Power System

- 3.7V Li-ion battery
- TP4056 USB-C Charging Module with Protection
- 5V Boost C