LPC 826 negative pin needed or not?

[personx910]

Hello,
I am building LPC 826 laser, with lm317 driver
3 ohm resistor
2x CR2 3.0v batteries


So , my question is,
do I need to solder negative pin to heatsink (which carries negative from host body) or I can just remove it?
Thanks

 

[marcuspeh]

If i am right, the diode is case negative diode so there is no need to solder the negative pin to the heatsink

 

[personx910]

So case negative means that, Thank you.

 

[Mohrenberg]

Yup, the negative pin is part of the body of the diode, it's already being fed into the heat sink.