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FrozenGate by Avery

Power a laser with lead battery

irish303

irish303

Active member
Joined
Jul 26, 2019
Messages
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I have been wondering for a long time if it is possible to power a laser with a lead battery (max 12V - 5mhA, 3mhA, 2mhA)
So I turn the question over to you ...
 





I'd like to say, "of course it is".

You would need to regulate voltage and current to the laser. I guess it really depends on your power requirements and the type of laser.

I guess I don't know what mhA is though... Can someone direct me to what this is a unit of?
Edit: nevermind... I guess I've always wrote/read mAh. I'm guessing this is it.
 
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Bryverine said:
I'd like to say, "of course it is".

You would need to regulate voltage and current to the laser. I guess it really depends on your power requirements and the type of laser.

I guess I don't know what mhA is though... Can someone direct me to what this is a unit of?
Click to expand...

Yes, in fact, then I can buy 7W -450nm laser modules powered at 12V, but I have to check their amperage.
At least with a lead-acid battery it's easier for now!
Building a laser pointer or something more challenging for now is not in my technical-constructive abilities
 
paul1598419 said:
Any laser driver that can operate at 12 volts will work.
Click to expand...

As I said .... for now it is better to proceed with easy things to realize, then studying better your posts I will acquire some of that practice that now I don't have
 
You needn't concern yourself with the current as the driver will only pull the current it needs. If you are using a 500 amp cranking power battery, it doesn't matter as long as the driver will operate at 12 volts.
 
irish303 said:
Yes, in fact, then I can buy 7W -450nm laser modules powered at 12V, but I have to check their amperage.
At least with a lead-acid battery it's easier for now!
Building a laser pointer or something more challenging for now is not in my technical-constructive abilities
Click to expand...
For 7W, you would need a good supply of current like 2A+ is my guess (assuming 30% efficiency)... If you have a 5mAh battery you won't get much run time.
 
What are you meaning by "lead battery (max 12V - 5mhA, 3mhA, 2mhA)"?
What lead battery specifically are you talking about?

Do you mean mAh/miliamp hour/ 1/1000th of an amp hour or Ah/amp hour ----5, 3, 2 mAh is nothing and be of little if any use in powering a 7W 450nm diode and driver.
 
Maybe he means the small lead batteries for alarm installations which are still sold over counter in some electronic shops until today -
www.bateria.es

YUASA Batería plomo NP2.3-12 Vds

YUASA Batería plomo NP2.3-12 Vds * www.Bateria.es - Tienda de pilas y baterías de calidad baratos
www.bateria.es www.bateria.es

I would use a lead battery if a really crazy current >20A would be needed. All the rest can be handled by lithium batteries.

EDIT: Once I have used this one - it easily gives 12A at 12V (look at the specs pdf)
 
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I used to have one of those small lead acid batteries in my home alarm system back in the 1990s. They are smaller than car batteries, but still have a high current capacity.
 
Thank you so much for your answers ...!
The 7W of which I speak is similar to this : 1564301213289.png

Size: 7W
Technical Parameters:
Laser wavelength: 450nm blue laser
Spot type: dotted (adjustable)
Output power: 7W
Size: 2.5W(33*70mm) , 3.5W(33*70mm) 5.5W(40*70mm)
Drive mode: external ACC constant current drive
Cooling method: forced air cooling
Operating voltage: 12V DC The amperage is not specified ... strange
Control interface: 2 * 2.54 (TTL control switch, PWM control power)
Shell material: aluminum, surface anodized
Collimator lens: optical glass coating
PACKING LIST:
LASER*1
3PIN CABLE*1
3PIN TO 4PIN CABLE*1
SAFETY GLASSES*1



And I would like to feed it (given my inexperience in building one from scratch) with a 12V lead-acid battery (being a 7W-450nm) from ignorant I say, say 10Ah? may it be enough or will i go right right?1564301477027.png

12V 10AH Sealed Lead Acid Battery with T2 Terminals:
REPLACES: 26058, 6-DZM-10, CB10-12, CE5, CE6, MA 2.0 Lawn Mower, PSH-12100F2, REC10-12, S-180, S500, WP10-12S
Chrome Pro Battery SLA batteries are 'the workhorse of ALL batteries' and are constructed with lead calcium alloy and absorbed glass mat technology, which allows for completely 'maintenance-free' operation.

  • Dimensions: (H)4.37" x (L)5.94" x (W)2.56"
  • Weight: 7.5 lbs
  • Volts: 12
  • Watts: 120
  • Polarity: [+ -]
  • Terminal Type: T2
 
No answer about my last quote?
Aren't YOUR questions / curiosities / insights of YOUR interest?
 
I'm not completely sure what you're asking here, but that 12V battery shown in your above post is more than capable of powering that 7W diode module. (See Paul's post #6)

BTW, you won't always get an answer to your questions right away, it may be a few days, or more.
 
Oh .... thank you so much BowtieGuy,
Then I am affixed :-) I just have to proceed with the purchase!
Not having enough experience, I was impatient to know this news ... that's why we insisted!
 
watch #12 post

Instead, my buil (so to speak) will be the purchase of this 7W laser module and this 12V - 10Ahm lead acid battery
Connect the cable + and the one - to the battery, maybe I'll insert a pressure switch or on / off and have fun!

When I have the necessary skills, maybe I will be able to do better!
 
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