Currency Exchange Rate Cheatsheet

Overview

Introducing the fully customisable currency exchange rate cheatsheet, a practical tool designed to provide quick and easy access to common currency conversions between two currencies of your choice. This credit card-sized gadget is perfect for everyday use, whether you're shopping, travelling, or simply learning about currency conversions.

Features

• Compact and Portable: Sized to fit conveniently in your wallet, it's easy to carry.
• Durable and Waterproof: This cheatsheet is built to withstand daily use. Its waterproof nature ensures it remains readable and intact, even if accidentally exposed to water/rain/beer/seawater etc.
• Pre-Determined Values: The cheatsheet includes customisable common exchange values - €1, €2, €5, €10, €25 etc
• Dual-Sided Convenience: One side features rates from your local → foreign currency, while the other provides foreign → local conversions, making it versatile and user-friendly.

Benefits

• Quick Reference: No need to fumble with your phone or wait for an app to load. The cheatsheet offers instant access to key exchange rates.
• Safe and Secure: Avoid the risk of exposing your phone in public places, reducing the chance of theft or loss.
• Educational Tool: Great for kids and adults alike, this cheatsheet can help with learning and understanding currency conversions in a tangible and interactive way.

Ideal For

• Travellers: Seamless and quick conversions while on the go, helping you manage your budget and understand costs in a foreign currency.
• Shoppers: Easily calculate prices and deals when shopping in another currency.
• Students and Learners: A perfect tool for educational purposes, making learning about currencies straightforward and engaging.
• Everyone: From daily commuters to business professionals, anyone dealing with multiple currencies can benefit from this practical tool.

OpenSCAD Customisation

• To/from currency name/code. E.g EUR / GBP
• To/from currency symbol
• Exchange rate
• Decimal character - some countries/currencies use different characters for decimal e.g a comma used for Euros.
• Base values - pick your own values to convert e.g £1,2,3,5… or £10,15,35,50 etc

Preparation

OpenSCAD doesn't support colours or multiple overlapping objects within the same STL so there is a bit of work to do in Bambu Studio to get this model ready for printing, but it's very quick and easy to do.

Essentially the OpenSCAD script outputs 2 parts, one with the text indented and another blank card. We clone both parts so we start with 4 parts.

With one group we set the text part as a negative of the blank card - this creates the black text and border only.

With the other group we delete the blank card and then overlay the black text over the remaining white part.

It won't look right on the “Prepare” tab and you will probably get an error about empty spaces, but you can ignore that and wait for the preview to render which should then look correct.

Sounds confusing, so here's a video where I run through the entire process in under 2 mins.

https://youtu.be/jF_51SElZ4Y

Printing

I recommend printing with a 0.2mm nozzle if you have one (my example images were printed with 0.2mm) but 0.4mm should also work, especially if you play around by reducing the line widths etc.

• 100% infill
• Arachne walls

I also recommend calibrating your filament before printing to avoid stringing and keeping the print as clean as possible. I used up the last of an old roll of black filament which wasn't the best idea as it had a bit of stringing, but it's still perfectly readable.