JPY YEN ßàAUD converter device – 2025-09-14

Using a RPI Pico, a 1.14” LCD display + buttons combo, and a small battery, I have created a pocket currency converter.

A screenshot of a computer

AI-generated content may be incorrect.

Note: the listing depicts an older version of the product, the current one used in this project has 2 buttons on the right, and a 4-directional joystick on the left.

In the device, the following buttons do the following:

UP Joystick	Increase by 100yen or 1aud
Down Joystick	Decrease by 100yen or 1aud
RIGHT Joystick	Increase by 1000yen or 10aud
LEFT Joystick	Decrease by 1000yen or 10aud
Button A	Switch conversion direction
Button B	Clear values

The exchange rate is set to: 1 AUD = 98.22 JPY

The battery is an 18650 cell inside a portable case. It fits well in a shirt or other small pocket.

If you want to create the project yourself, use this .uf2 file to drag onto the pico, and use this micropython code (I used Thonny to program it).

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