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Laser Gun Circuit: Need Help Please

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Durach

New Member
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?

**broken link removed**
**broken link removed**

Replies are really appreciated.
 

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Durach

New Member
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.
 

ericgibbs

Well-Known Member
Most Helpful Member
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
 
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Durach

New Member
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. =^^=;
 
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Nigel Goodwin

Super Moderator
Most Helpful Member
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?

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.
 
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