please help me wire up a laser module

[rjlwest]

Hi, I have 4 x 10mw 3.2vdc laser module and I have an AC adapter with a DC3.2V 500mA output.

I bought these last year and can't remember the research I put in, I think my plan was to put them in parallel but now I think I may need resistors?

Please could someone guide me, maybe even link to a tutorial so I can learn it all.

cheers.


Mod Note: edited title and OP's post]

 

[Krapoman]

Hi,
I guess a resistor could be a good idea, but i'm not sure it's needed.
To calculate a protective resistor , we got to know the operating current of the laser module, in mA.

you can read that :
https://www.electronicspoint.com/resources/power-supplies-common-terms-and-limitations.55/

and that :
https://www.electronicspoint.com/resources/electronic-power-and-resistance-rules.32/

 

[davenn]

hi there
welcome
can you tell us more about the laser module. make / model and a photo or 2 would help


Dave

 

[rjlwest]

hi, yeh its this one

http://www.aixiz.com/store/product_...d/352/osCsid/c2d8dafd1f5eaab5671f0e8ee4d64784

before I asked, I was reading things about laser diodes, i think this is different being a laser module and I'm thinking it must already have a resistor. I think all I need to know is if it just needs to be wire in parallel now, I assume it can and it's a relatively easy thing to do.

 

[Krapoman]

They have to be wire in parallel.
And you don't need a resistor. eventually a fuse..

 

[rjlwest]

cool, thanks.

 

[davenn]

hi, yeh its this one

http://www.aixiz.com/store/product_...d/352/osCsid/c2d8dafd1f5eaab5671f0e8ee4d64784

before I asked, I was reading things about laser diodes, i think this is different being a laser module and I'm thinking it must already have a resistor. I think all I need to know is if it just needs to be wire in parallel now, I assume it can and it's a relatively easy thing to do.

yes, those laser modules have a laser diode and a driver circuit built into the casing
so they are all go for putting across the 3.2V supply

 

[rjlwest]

thanks, before I switch everything on, barring a bit of insulation tape, do these connections look ok? is this everything a parallel connection needs?

http://imgur.com/a/EZENb

 

[Krapoman]

All positives wired with positive, all negatives wired with negative.
On the pictures, it looks ok.