LEGO Mindstorms NXT Laser Guided Shooter

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I’ve been busy playing with my  LASER   Sensors , and have put together a Zamor powered LEGO Mindstorms NXT Laser Guided Shooter. If you would like to build your own, I have included the Model Instructions and NXC Program Code.



For this particular version of my LEGO Mindstorms NXT Laser Guided Shooter, I’ve been trialling an 5mW 780nm Infra-red LASER. Thus far all tests have proved very reliable up to around 2 metres. The biggest issue is the fact you can’t see the LASER Beam with the naked eye, which makes alignment rather tricky. To get around this I’ve been using my old Sony DCR-TRV18E MiniDV Camera’s Night Vision & USB streaming capabilities to see the position of the LASER. This method works very well and is only needed for the initial alignment of the LASER Sensor on the Robot, so the Beam runs parallel with the Robot’s Base.

Nxt Laser Shooter
LDraw Model of the LEGO Mindstorms NXT Laser Guided Shooter

The 780nm Infra-red LASER works on par with the standard Red LASER modules I have been using. I would really like to source some Green or Blue LASER modules that are smaller enough to replace the standard Red modules I currently use. Either the Green or Blue LASER modules should increase the detection range as they are outside the normal ambient light pollution levels you need to over come for greater detection distances above 2 metres.

LEGO Nxt Laser Shooter
Assembled LEGO Mindstorms NXT Laser Guided Shooter

My standard Red LASER Sensors are reliable below 2 metres, but above, external light sources can make the detection erratic. The difference between natural, florescent and incandescent light source is like chalk and cheese. I find that florescent lighting, which tends towards the blue end of the visible spectrum gives by far the best results.

Ultrasonic Zamor Shooter
You Can also build it as a Ultrasonic Guided Shooter
(If you down have one of my LASER Sensors)



View Laser Guided Shooter NXC Code:

 

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