Laser Gun Circuit: Need Help Please

Durach

New Member

• Feb 24, 2007

• #1

Hi,

I found this circuit in the book 'Robotics, Mechatronics And Artificial Intelligence' by - Newton C. Braga

It seems like quite a simple circuit but i can't make head or tail of how it is supposed to act like a laser gun. Can anybody please explain to me its working?

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**broken link removed**

Replies are really appreciated.

 

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Durach

New Member

• Feb 24, 2007

• #2

And sorry for double-posting but, just to mention, the book doesn't give any explanation as to how the circuit functions. Any other model of laser gun with explanation is also welcome.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 25, 2007

• #3

It's just a switch for a laser pointer, it's not a 'gun' at all.

 

ericgibbs

Well-Known Member

Most Helpful Member

• Feb 25, 2007

• #4

hi,

Its just a way of switching a 'laser pointer' ON/OFF using a transistor and a logic output,,, from somewhere?.

From my usage of laser pointers, the switching ON/OFF response is slow, so pulsed modulation is probably going to be limited.

Its a very inefficient way of switching a laserpointer.

Eric

 

Last edited: Feb 25, 2007

Durach

New Member

• Feb 25, 2007

• #5

I see. Thank you for clarifying, Nigel and ericgibbs. Can you guys tell me why the cascaded IN4002 configuration is being used in the collector?

Sorry for being a such a bugger. =^^=;

 

Last edited: Feb 25, 2007

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 25, 2007

• #6

Durach said:

I see. Thank you for clarifying, Nigel and ericgibbs. Can you guys tell me why the cascaded IN4002 configuration is being used in the collector?

Click to expand...

It's to drop the supply voltage to a suitable level for the laser pointer, the three diodes will give about 1.8V for the laser pointer.