LASER Pattern Generator Project

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LASER Pattern Generator Project
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I was fascinated by LASERs when I first went to IIT Kanpur during my school days. Since then I have been reading / playing a lot with LASERs. My first one was a LASER trip wire and then a LASER pattern generator. It all was around 10 years back. Having recently acquired an Arduino UNO a plethora of options have opened up. I have started to learn from the beginning and this time I have the power of a microcontroller with me. !0 years back these things were hard to find and were freaking expensive and I didn’t have a sponsor :P

Now I play around with stuff and fund my own projects. I have recently made a dice and a digital thermometer just to learn the new way of doing it.

Next was this LASER Projector (pattern generator to be precise). It involves two DC motors and L293D as a motor driver.

I customized the Motor driver circuit for speed control with Arduino PWM.

The table shows the connection details.

Arduino / Motor

L293D Pins

Arduino / Motor

3 PWM

1

16

 

5

2

15

9

Motor A +

3

14

Motor B +

GND

4

13

GND

GND

5

12

GND

Motor A -

6

11

Motor B -

6

7

10

10

12 V

8

9

11 PWM

 

Two push buttons were added to control the speed of one motor. The other one rotated with a constant speed. One PWM pin was used to control the LASER as it gets too hot when switched on continuously.

Video

http://www.youtube.com/watch?feature=player_detailpage&list=UUd8UH0KW9uS...

Embedded video:
See video

Comments

prat's picture

Welcome

Nice work buddy.

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