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lasersbee

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The case of the Pointer and Laser Module is used as the return
path of the current like 99% of Laser pointers..

Jerry
 

Trevor

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Current flows through the case of the laser diode and through the die. No wire required.

-Trevor
 

qumefox

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Or put another way.. The case of the laser IS the other wire.
 
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There are 3 pins on most diodes. Pos, neg, case. They just ground the pos pin of the diode on the case, the case is pressed into a heat sink, which is pressed into the host, which the pos spring connected. Its a complete circuit. If you wanted to use just the module you'd need to hook the pos to the heat sink on the module.
 




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