Braille18 - cmubuild18/Build18 GitHub Wiki

Braille18

A modular text-to-braille display specially designed for children learning braille. It uses character recognition and a solenoid array to immediately go from a page of text to a tactile braille display that is large and easily readable by little fingers!

Braille18

The aim of this project was a cheap text-to-braille display, compared to the more expensive displays common on the market, aimed at children who don't have the fine motor control to effectively read most commercial displays. It uses OCR to scan and parse a page of text into a string, then converts it into display-sized chunks and translates to braille. This braille is then outputed to the display mechanism. The display consists of an array of solenoids, arranged in blocks of braille characters. The blocks are entirely modular - each can be hooked directly onto the end of the last block, snapping into place mechanically and linking to the next one. Electrically, the modular nature is achieved by having data outputed on a serial line so each block only needs to be connected to the previous one. The project is partially functional - all the components work, but the very high power draw of the solenoid array means it heats up extremely quickly, so can not be run for long periods of time without the risk of burning something out, and any attempts to limit current mean the large number of solenoids don't have enough power to run.

Team Members

Team Member Photo
Gyanepsaa Singh Team Member Photo
Chloe Poon Team Member Photo
Maggie Gong Team Member Photo
Yilu Huang Team Member Photo
Braden Liu Team Member Photo

Photos

https://drive.google.com/drive/folders/1aqjXz32zjXvGSeiMsEEJOnwp8qO04i9L

Parts

Part Unit Price Quantity Cost Needs to be Orderedthrough Build18? (Y/N) Part Link
Suction solenoid 1.68 66 110.88 Y https://www.aliexpress.us/item/3256802362889433.html?gatewayAdapt=glo2usa4itemAdapt
Raspberry pi 4 45 1 45 Y https://www.adafruit.com/product/4292
raspberry pi battery supply 39.95 1 39.95 Y https://www.adafruit.com/product/1566
Raspberry pi camera 19.99 1 19.99 Y https://www.amazon.com/Raspberry-Pi-Camera-Module-Megapixel/dp/B01ER2SKFS/ref=asc_df_B01ER2SKFS/?tag=hyprod-20&linkCode=df0&hvadid=309776868400&hvpos=&hvnetw=g&hvrand=8554370586789214823&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9005925&hvtargid=pla-406302832745&mcid=946fcdccb9973acc91f2c08c4c6490a9&gclid=Cj0KCQiA3uGqBhDdARIsAFeJ5r36NvYs-7YGCZRL8JmqW2EoDLawZY8_mfNCb6WAMDHzlwRxhCEbR_EaAqy0EALw_wcB&th=1
Neopixel light bar 5.95 1 5.95 Y https://www.digikey.com/en/products/detail/adafruit-industries-llc/1426/5395892?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax%20Shopping_Product_Medium%20ROAS%20Categories&utm_term=&utm_content=&utm_id=go_cmp-20223376311_adg-_ad-__dev-c_ext-_prd-5395892_sig-Cj0KCQiA3uGqBhDdARIsAFeJ5r2XptSSUW8mPuEvRfwdZj2nPwERgtNn3MMM4GXqk6kH3UspXVt1VxkaAtiXEALw_wcB&gad_source=1&gclid=Cj0KCQiA3uGqBhDdARIsAFeJ5r2XptSSUW8mPuEvRfwdZj2nPwERgtNn3MMM4GXqk6kH3UspXVt1VxkaAtiXEALw_wcB
Techspark 3d printing
Total Cost: 221.77
Remaining Budget:(out of $250) 28.23