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Can I just hook up at battery using jumpers?

jwjsr

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I am new and do not understand much and i don't want to damage the module by doing something stupid.
I am waiting for the host and have received the laser module and was curious if i could test the module by using jumper wires from any battery i may have laying around, I have an 18650, would using a lower voltage batt to test just decrease the brightness


532nm 120mw Green Laser Module/Green Laser Dot Module/3.0V-3.7V

532nm 120mW Green Laser Module Green Laser Dot Module 3 0V 3 7V Spcial OFFER | eBay
 

Cyparagon

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Have you tried clipping jumpers to an 18650 before?

would using a lower voltage batt to test just decrease the brightness
Generally, no. Laser drivers operate in constant current. Brightness will not change with a change in input voltage (provided the voltage is within the driver's operating range)
 

hakzaw1

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from TECHHOOD

'=
Duty Circle

60 secons on and 5 secons off'

this is what they meant


Duty Cycle

60 seconds on and 5 seconds off'
_____________

IF this were NOT a 'module' attaching direct to a battery would be a very BAD idea
even inside its brass enclosure this green module has very little heat protection- I do not agree with the duty/rest cycle as such
prolly OK IF the ambient temp is low or you are in A/C
BUt in a hot place I would go with a 50/50 RD cycle (equal off as well as on)
AFAIK it is impossible for a laser to cool below the ambient temp.

So if its 100 F - you might consider a more conservitave DR cycle.
Especailly if your final host has a small HS-

no harn using your 18650 wth possible excpetion that--- it can be overcharged to > 4.2vdc-- I have powered Pen Pointers with Li-ions and had no problems-

Techhood has a pretty good rep here- thay had always done me right.

good luck (be sure you are 100% SURE of the polarity. & do not assume it comes with a 'good'or any IR filter)
 
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jwjsr

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It is way funny you would ask " have you tried clipping jumpers to an 18650 before."
Yes I have after visiting this thread :
http://laserpointerforums.com/f67/h...es-how-measure-internal-resistance-57576.html.
I thought I was gonna kill my self trying. I spent the last week figuring out how to solder magnets to test leads, I went to hobby lobby and followed some instructions i found on this forum and soldered leads on 9 magnets and for backup bought a micro-scale test lead set from radio shack that contains magneto leads.
 

jwjsr

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curiosity killed the cat!. i overasked my question, can't i just direct wire for 10 or 15 secs to see it!!,
 

jwjsr

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Let me tell you how new I am, I just discovered magnets don't stick to wire
 

Cyparagon

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Be advised the wire on those holders is 30awg and the springs are long coils of steel. That holder essentially adds ~0.5Ω in series to your cell. That's probably okay for your 200mA module there, but it's useless for high current applications.
 

jwjsr

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Thanks for your help. Later today I'll test it direct to the 18650 magnetic leads I made, hopefully nothing blows up and black is the negative !
 




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