Modular coin bank (EUR, CZK)

Introduction:

The purpose in mind was to place this in my hallway, so that I can frequently empty my pockets of the coins I get as change and I also get the idea of how much it there saved already. You can also set your own saving goal by making a set that sums up to your target. Modular parts and sets for EUR 560 and CZK 11200 are provided. 

There are 3 types of files: 

1. Stands
2. Bits
3. Sets

The stands come in different shapes and sizes to fit the ambience and different purposes, the sizes range from 1 to 12 bits.

Bits are available for EUR coins (2€, 1€, 50c, 20c, 10c, 5c) and CZK coins (50kč, 20kč, 10kč, 5kč, 2kč, 1kč), two sizes (short and tall) for each variety. The inner engraving tells the nominal value of the coin, the outer engraving tells the sum value if the bit is filled by the coins of the indicated nominal value. The outer footprint is identical, so you can easily combine the currencies. The slit in one side allows for visual inspection and for the use of a tool to pry out stuck coins.

The sets are more of an experiment, they are designed to be filled with 1€ or 20kč respectively and they are a little gamified way of making savings, intended for kids etc. The goal of 560€ or 11200kč is divided in 6 levels, grouped and denoted by column height. Each level's value is indicated on one of the level's bits. The sum values are arbitrary, good for a gaming console, sports equipemnt, or a Prusa Mini ;-) Other goals may be created by putting stands and bits together, of course. There is a Braille version of the EUR set.

The two currencies are the ones I use, remixes for other currencies are welcome (the outer diameter of a bit's footprint is 17.7mm). 

Print settings and notes:

The models were designed with .4mm FDM and PLA in mind, but other nozzles and materials may work just fine.

Each bit should tightly fit in the stand (the clearance is 0.3mm), but you may want to change the physical size of the stand between 98% - 102%, I suggest printing the bits you want and and trying one in the smallest (stand_1_circular) stand. Tune the stand settings until you have found what works for you. A tight fit is suggested, beware of the elephant foot. Use adhesive, if you want to make sure they will not tip over.

Careful, there are engravings at the bottom of the pre-made sets, so depending on your slicer, printer and material, you may want to turn the supports off, or even submerge the model by 1mm to disable the engraving completely, if problems occur. 

Designed using Tinkercad.