rpi5 and camera adn buttons
detection system working
braille system using solinoids

Brailler

jnsipreation

Many of the blind poeple cnat see n rea the signs arund cities, braile o around the elevators inspired us to make this

What it does

our tablet captures an image using a raspberry pi and a usb camera, runs OCR API on the Raspberry pi on the captured text, cleans it up, converts the characters into braille dot patterns, and then sends those patterns to an Arduino.
The asrduino drives a 12-solenoid braille cell each solenoid represents a dot, and the system pulses them to raise the pins. so that the blind can feel and read it The user can step through the text using physical buttons on the pi. Not all the solenoid done but we made 12 olenoids for very cheap for about 20,000 rs which is very less compared to braille tablet which cost 10,000$ without the camera system!!!

how it was built

The raspberry Pi handles the software side: OpenCV for image capture, EasyOCR for text recognition, some simple preprocessing to reduce glare, and a bit of spell correction to clean up the results.
Braille patterns are encoded as six-bit arrays. The Pi compresses these patterns into a 12-bit string and sends them over USB serial at 115200 baud to the arduino which oes the hardware stff

On the Arduino side, each solenoid is attached to pins 2–13 (avoiding pins 0 and 1 since those are tied to the onboard serial interface). A quick pulse activates the solenoid, and everything resets afterward.
We tested the hardware with a basic bench supply and eventually added flyback diodes after learning the hard way that skipping them is a bad idea.

The wiring was more finicky than expected, especially with cheap jumper wires that pretended to be copper but weren’t. Soldering a proper board helped.