Shahariar
Published © GPL3+

Laser Projector Badge

A laser projector made with 25 dot lasers, a micro:bit board, and Ada programming.

IntermediateFull instructions providedOver 1 day202

Things used in this project

Hardware components

BBC micro:bit board
BBC micro:bit board
×1
Dot Laser
×25
PC817 Opto-Isolator
×25
0 ohms Link
×100
AWG Magnet wire
×10
Generic Proto board 9x15 cm
×1

Software apps and online services

GNAT Community
AdaCore GNAT Community

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

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Schematics

Sch

Note: Column is mirror connected (1st col LEDs>5th col Lasers, 2nd col LEDs>4th col Lasers for text symmetry)
Ckt ljzzvbezce

Code

Untitled file

ADA
------------------------------------------------------------------------------
--                     Copyright (C) 2018, AdaCore                          --
--                                                                          --
-- This is free software;  you can redistribute it  and/or modify it  under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  This software is distributed in the hope  that it will be useful, --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public --
-- License for  more details.  You should have  received  a copy of the GNU --
-- General  Public  License  distributed  with  this  software;   see  file --
-- COPYING3.  If not, go to http://www.gnu.org/licenses for a complete copy --
-- of the license.                                                          --
------------------------------------------------------------------------------

--  This simple example shows a scrolling text on the micro:bit LED matrix.
--
--  It is intended as first project to get familiar with Ada and GNAT
--  Programing Studio on the micro:bit.
--
--  For more advanced micro:bit features please have a look at the
--  Ada_Drivers_Library project: https://github.com/AdaCore/Ada_Drivers_Library
--
--  The micro:bit has a 5 x 5 multiplexed LED matrix, this means only one LED
--  can be lit at a time. To overcome this limitation, the LEDs are lit one
--  after the other very quickly. This process, called scanning, happens so fast
--  that the human eyes sees all the LED lit together (persistence of vision).
--  In this example, the scan is done with a periodic Timing_Event. Timing_Event
--  is an Ada standard feature that allows you to have a callback executed at a
--  give point in time and can be used to create periodic timers. The periodic
--  timers are implemented in the Generic_Timer package.
--
--  The LED matrix initialization and text scrolling are implemented in the
--  Display package.
--
--  The hardware maping for the GPIOs has been generated from a SVD description
--  file using SVD2Ada: https://github.com/AdaCore/svd2ada

with Display;

procedure Main is
begin

   loop
      Display.Scroll_Text ("Hacked with Ada ");
   end loop;
end Main;

Credits

Shahariar

Shahariar

39 projects • 123 followers
My Fate is Dinosaur's Fate - Extinction !
Thanks to Fabien Chouteau.

Comments

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