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Author Topic: what to do with laser torch  (Read 739 times)

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Offline aruna1Topic starter

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what to do with laser torch
« on: April 29, 2010, 10:19:58 AM »
hi
I have a laser torch (one that comes as a key tag).
is there anyway to do something useful with this?
like obstecle sensor? should be some thing that can be made with some comman components.
thanks
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Offline Razor Concepts

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Re: what to do with laser torch
« Reply #1 on: April 29, 2010, 10:35:24 AM »
For an obstacle sensor you could use a camera to detect the beam, but that isn't very easy. You can't easily make an obstacle sensor with it.

Offline Soeren

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Re: what to do with laser torch
« Reply #2 on: April 29, 2010, 01:08:57 PM »
Hi,

I have a laser torch (one that comes as a key tag).
is there anyway to do something useful with this?
like obstecle sensor?
If it has to be simple, you could use it as a broken beam detector by shining it on an LDR.

For an obstacle detector, you need to modulate the beam and use a photo transistor with an amplifier with eg. a PLL tone detector (like NE567/XR567) that sense when the beam lights up an object. It will be more involved and ambient light might be a problem if used outdoors.
Regards,
Søren

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Offline aruna1Topic starter

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Re: what to do with laser torch
« Reply #3 on: April 29, 2010, 05:58:55 PM »
Hi,

I have a laser torch (one that comes as a key tag).
is there anyway to do something useful with this?
like obstecle sensor?
If it has to be simple, you could use it as a broken beam detector by shining it on an LDR.

For an obstacle detector, you need to modulate the beam and use a photo transistor with an amplifier with eg. a PLL tone detector (like NE567/XR567) that sense when the beam lights up an object. It will be more involved and ambient light might be a problem if used outdoors.

HI,
can we sense reflection of laser beam? its not like sensing IR reflection
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Offline billhowl

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Re: what to do with laser torch
« Reply #4 on: April 30, 2010, 05:09:04 AM »

 


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