In the market there are numerous proposals attending to each of the different categories named in advance. Next, the most representative devices are presented, specifically among those classified as "devices that seek to manage information in Braille", differentiating between:

• Material recomendado en el “Catálogo Tiflotécnico 2019” publicado en septiembre de 2019 por el Centro de Tiflotecnología e Innovación (ONCE-CTI) descargable desde el siguiente enlace: http://cti.once.es/home.cfm?excepcion=5
• Dispositivos de código abierto compartidos en plataformas como Ubora-Kahawa u otras.
• Artilugios que realizan otro enfoque o que son dignos de mención.

ONCE typhotechnology catalog

Annotator with line Orbit Reader 20

Portable annotator with three modes of use, annotator, braille line and book reader. It has an 8-point Perkins keyboard and a dynamic 8-point braille line of 20 cells. With the ability to connect via USB, Bluetooth 2.1 to computers and mobiles, as well as the ability to read SD cards. Some of its features and technical specifications are:

• Annotator mode: The Orbit Reader 20 includes a file manager with the main features of a text editor (copy, paste, delete, etc.)
• Braille line mode: Reading line with connectivity via Bluetooth to mobile devices and computers via Bluetooth and USB.
• Book reader mode: Reading books in .BRA, .BRF, .BRL and .TXT formats, previously converted to 8-point Braille, from the SD card.
• Compatible with JAWS, NVDA, Windows-Eyes, Dolphin ScreenReader, Mac OS X, Android, Chromebook and Fire tablets.
• USB 2.0 port (USB micro-B) for charging/communication.
• Capacity for SD memory card up to 32 GB.
• Bluetooth connectivity 2.1, class 2.
•  Ion-lithium battery of 2200 mAh.
• Dimensions: 11,2 x 16,8 x 3,55 cm.
• Net weight: 450 g.

Orbit Reader 20 Source: (www.maxiaids.com, 2019)

Braillenote Touch 18 y Braillenote Touch 32

18 or 32 cell Braille tablet, with the ability to take notes and read braille. Very efficient, it is able to read books, access mail and navigate quickly. Available in English, French, Danish, Swedish, Norwegian, Dutch, Spanish, German, Portuguese, Italian, Polish and Hebrew. Some of its features and technical specifications are:

• Tablet that uses KeyWord for document management, Victor Reader to read books, KeyMail for mail management and KeyWeb to surf the web.
• USB/ micro USB cable.
• 8 GB SD memory card.
• 7” (18 cm) LCD screen.
• Dimensions: 24,4 x 16,02 x 2,06 cm.
• Net weigh: 900 g.

Braillenote Touch 32 y 18. Source: (www.bridges-canada.com, s.f.)

Braille Index Everest D-V5 Printer

Interpoint braille printer that allows printing in any format at a printing speed of 110 characters per second or 400 DIN-A4 sheets per hour, with adjustable spacing. Some of its features and technical specifications are:

• Connectivity USB, Bluetooth, Wi-Fi and Ethernet.
• Compatibility with drivers for Windows, Mac y Linux, as well as idB files.
• Supply voltage: 100-240 V AC.
• Dimensions: 45 x 56 x 18 cm.
• Net weight: 12 kg.

Braille Index Everest D-V5 Printer. Source: (compartolid.es, s.f.)

Braille Focus 14 y 40 V Generation Line

Braille line of 14 or 40 cells that includes an 8-key Perkins keyboard. Device compatible with mobiles, comuters and other devices via Bluetooth and USB. Some of its features and technical specifications are:

• Compatible with JAWS software for Windows.
• Dimensions of Braille Focus 14: 16 x 8,2 x 1,9 cm.
• Net weight of Braille Focus 14: 328 g.
• Dimensions of Braille Focus 40: 33,7 x 8,2 x 1,9 cm.
• Net weight of Braille Focus 40: 650 g.

Braille Focus 40 V Generation Line. Source: (www.flying-blind.com, s.f.)

Open source devices

IBIS Open Source Braille printer

Printer that, from text files, translates to the Braille alphabet and prints in relief. Designed to be printed in 3D and can be assembled in a few steps and with few tools its purpose is to reduce costs up to 6 times compared to the competition. (galerias.bid-dimad.org)

IBIS Open Source Braille printer. Source: (galerias.bid-dimad.org)

BrailleRapSP

Open Source Printer made from 3D printed parts and wooden pieces, which has its own software. (braillerap.com, s.f.)

BrailleRapSP. Source: (braillerap.com, s.f.)

Open Source Braille Display

Gadget that, by means of the use of two rotating motors next to a mechanical network of gears and endless screws governed by an electronic controller, manages to reproduce the different combinations of the Braille alphabet. (www.utopiamechanicus.com, s.f.)

Open Source Braille Display. Source (www.utopiamechanicus.com, s.f.)

3D Printed Braille Display

Prototype that, by means of a set of endless gears and screws aims to control the extension and retraction of sets of three pins or points, generates the different combinations. For this, vibrating motors controlled by an Arduino will be used, together with a position sensor, to determine the current combination of pins.("pyrophreek", 2013)

3D Printed Braille Display. Source: ("pyrophreek", 2013)

Refreshable Braille Display

Artifact that, using modified vibrating motors such as cams managed by a microprocessor, manages to control the position of the pins or points individually, by having individual followers pressing the plate where the pins are housed. (Varada, 2016)

Refreshable Braille Display. Source: (Varada, 2016)

OpenBraille

Open Source Printer manufactured with common parts in 3D printers, controlled by an Arduino MEGA and which has its own 3D printed braille encoder, like some if the non-wooden parts. ("cccampos7", 2017)

OpenBraille. Source: ("cccampos7", 2017)

Other solutions

Braille Tablet

System designed by MIT that uses microfluids, which is intended to substantially reduce the cost of Braille lines.

Its operation is based on the uso of air or other type of fluid to inflate a set of small blisters that in turn individually actuate each of the pins or points. (Engineering, 2015)

Ilustración 14. Solución Neumática. Fuente: (Brewster, 2016)

References:

www.utopiamechanicus.com. (s.f.). Obtenido de www.utopiamechanicus.com: https://www.utopiamechanicus.com/article/open-source-hardware-braille-display/
www.maxiaids.com. (2019). Obtenido de www.maxiaids.com: https://www.maxiaids.com/orbit-reader-20
www.bridges-canada.com. (s.f.). Obtenido de www.bridges-canada.com: https://www.bridges-canada.com/products/braillenote-touch-18-32?variant=12943795617874
compartolid.es. (s.f.). Obtenido de compartolid.es: https://www.compartolid.es/index-everest-d-v5/
www.flying-blind.com. (s.f.). Obtenido de www.flying-blind.com: http://www.flying-blind.com/tidbits2017.html
galerias.bid-dimad.org. (s.f.). Obtenido de galerias.bid-dimad.org: http://galerias.bid-dimad.org/septimoencuentro/es/ibis-impresora-braille-open-source/
braillerap.com. (s.f.). Obtenido de braillerap.com: https://braillerap.com/
Brewster, S. (11 de Enero de 2016). www.technologyreview.com. Obtenido de www.technologyreview.com: https://www.technologyreview.com/s/545301/in-pursuit-of-an-affordable-tablet-for-the-blind/
compartolid.es. (s.f.). Obtenido de compartolid.es: https://www.compartolid.es/index-everest-d-v5/
Varada, V. R. (2016). hackaday.io. Obtenido de hackaday.io: https://hackaday.io/project/10849-refreshable-braille-display
"cccampos7". (2017). www.instructables.com. Obtenido de www.instructables.com: https://www.instructables.com/id/OpenBraille-a-DIY-Braille-Embosser/
"pyrophreek". (17 de Mayo de 2013). www.thingiverse.com. Obtenido de www.thingiverse.com: https://www.thingiverse.com/thing:90144