A full documented open source DIY Braille embosser, with associated open source translation software. Based on a 3D printer controller board, BrailleRAP can emboss Braille "dots" anywhere on a A4 sheet. You can use 160g paper, thin metal or plastic sheet. The average total cost is about 250 $ if you purchase everything. The cheapest commercial solution is about 2500 $. To emboss Braille document, you can use several software to translate text in Braille and send it to BrailleRAP, and you can also emboss SVG drawing. BrailleRAP is open source, licensed under CERN Open Hardware Licence v1.2. AccessBrailleRAP, our Braille translation software (NVDA compatible) is licensed under GPL V3. Thanks to them we use several open source projects : - Marlin firmware (GPL V3) - LibLouis (GPL V2.1) - Eel (MIT) - Music21 (BSD) - React.js (MIT) - NatBraille (GPL V2) - pandoc (GPL V2) - Printrun / Pronterface (GPL V3) - purecss (Yahoo BSD)