Nothing really fancy, I created a set of 3D printed braille grade one block letters. These letter blocks are designed to embossed on paper, you can use a rubber roller to imprint these letters on paper. Each block fits in a single orientation so it the letters will always be in the correct orientation. There are respective english letters mark on each block.
Block Dimension: 10mm x 15mm x 5mm
How to make?
Pretty straight forward, download the zipped STL files and use a 3D printer to print these blocks. The zipped STL file contained braille letters from A to Z.