Braille Clock/Watch

Creating a "digital" braille clock/watch (for blind people obviously).

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Braille watch designed to give the exact hour with dots which rotates thanks to a program on a Arduino card.

Our goal is to help blind people getting more autonomy and be more discrete by feeling dots rather then earing the time by a voice. It's way less embarassing.

The idea came from this video

Big prototype.mp4

First try of how the project is gonna work.

MPEG-4 Video - 71.00 kB - 03/10/2017 at 15:15


MPEG-4 Video - 91.04 kB - 03/10/2017 at 15:15


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  • 4 × Stepper motors
  • 1 × 3D printer To print the wheels and the box
  • 1 × Micro-arduino card
  • 1 × RTC (Real TIme Clock) to keep the time in memory even if there's no alimentation
  • 1 × Micro-USB Cable

  • 5th week

    Braille Clock04/07/2017 at 14:04 0 comments

    Today the fablab received motors ... but the wrong ones. Indeed, they received the continuous servo motors we wanted to order at the beginning but the stepper motors we ordered last week aren't there yet.

    So, for the moment you can discover how our prototype will work :

    First of all, you can see bellow our wheel with the dots. There are only 4 dots by number because braille numbers are only code with the 1 to 4 dots. The wheels here are attached to a tip which is the link between the wheel and the stepper motor.

    Then all of this will be attached to the stepper motor. The stepper motor, as its name shows, will make the will turn step by step, which is exactly what we need to make a clock. We managed to find one stepper motor and measured it to take its dimensions and modelize it so we could finally launch the wheels printing.

    Stepper motor Finally, here is the final model with the box. The user will be able to read each number to have the time by putting his finger on the holes and slide it . The hole dimensions are designed to prevent the user to turn the wheel by accident and then disrupt the clock.

    We also started coding. But before we soldered our arduino card ! Indeed, we received it like that (photograph on the left) then had to solder it on ourselves (photograph on the right).

    With the code on Arduino, we were able to make the stepper motor turn as you can see on our twitter.

    Finally, we printed our first wheels. The first one in ABS plastic (left) and the second one in resin (right).

    Here it is ! This was a very productive week!

  • 4th week : new shopping list

    Braille Clock04/03/2017 at 20:09 0 comments

    It appears that the fablab we are working with did not order our servomotors. Anyway ! It seems like we'd ordered the wrong ones. With servomotors, we wouldn't be able to track the wheel's position. So instead we ordered stepper motors. Hopefully we will receive them in time for the 5th week .

  • 3rd week : Design

    Braille Clock03/24/2017 at 15:06 0 comments

    Today we are designing the cylinders with the dots in order to print them with the fablab's 3D printer. Each cylinder will have 10 sides and each side has up to 4 dots.

    Then the second goal of the day was to design with Google Sketchup the box in which there will be the cylinders, the motors and the arduino card.

  • 2nd week : change of plan !

    Braille Clock03/23/2017 at 19:48 1 comment

    For the watch/clock, we decided to use cylinders on which there will be dots. They will turn thanks to servomotors as you can see HERE .

  • 1st plan

    Braille Clock03/10/2017 at 15:56 0 comments

    1st idea was to create a QR code app (called Qr Pic) to convert and crop a picture to a PDF file.

    But we changed our mind. It was too complicated to code it. Moreover it is impossible to upload a file in an existing QR code. Usually it works the other way around : a QR code is created by a generator after a link has been chosen.

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danjovic wrote 4 days ago point

I have a fall for clocks and this is just amazing!

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