Should i insulate or not?

[trok2008]

i'm trying to make my first build here

Host: UltraFire C9 Cree (2xCR123A)
LD: LPC-826@400ma
Driver: (cheap aixiz driver 80-500ma)

i've used the search button, i will leave this diagram to explain (from Poor Microsoft Painter)

should i insulate the heatsink or not?
and if someone could show me how should i connect the P- and LD- wires i will be very glad

here is the driver on Ebay

Thank you!

 

[mhemling33]

Nope If you insulate then you will eliminate the cases ground. The only thing i would do differently is run the negative wire from the Driver to the LD but i dont think it is necessary.

Edit: Your driver operates fine above 2.5V so you shouldn't have an issue, but you might need to run two batteries if it isn't outputting enough current.

 

[trok2008]

@mhemling33 thank you for your help ..

so i should leave P- and LD- (on the driver) unconnected and i'm good to go?

that's really confusing unless the driver is regulating the current using the positive charge is that correct?

so the wiring will be like this:
battery + > Driver P+ > laser diode + (anode)
battery - > Laserdiode - (cathode)

sorry but i'm new to electronics

 

[IsaacT]

Positive Battery goes to Positive input on Driver. Positive output on driver goes to positive input on diode. Positive diode goes through diode to negative pin. Negative pin is connected to the casing, thereby completing the circuit and getting you to battery negative.

 

[trok2008]

@wannaburnstuff thank you very much for your help! :yh: