how can i convert a laser pointer to use wall power instead of batteries.?

Question

I have an experiment which requires the laser to be on for hours at a time, so i ned to convert the power source from 2 AAA batteries to wall power, what is the easiest way to achieve this?

Answer 1

Your other issue is that you probably have to hold down a button to keep the laser on. Maybe you were planning to tape that down or something?

You can readily find a laser (pointer) that will do what you want.

Check out this option.

1) Battery operated - but uses larger (D) batteries - laser pointer does not draw a lot of power and this will probably stay on for the hours that you require ($35):

http://www.holokits.com/hologram_laser.htm

2) If you want to do it with your laser pointer, you simply need to provide the same voltage as your AAA batteries (3V). Find a retail AC/DC converter that puts out 3V and find a way to connect that to the battery terminals inside your pointer.

-Make sure you hook up the correct polarity (+/-)! Laser diodes don't like reverse voltages.

Sigh. You other guys don't know what you are talking about. 3V converters are easy to find...

http://www.oselectronics.com/ose_p17.htm

Answer 2

It isn't going to be very easy to find what you need. Radio Shack has gotten rid of a lot of the project stuff that they used to carry in the past.

Think about the experiment when you learned about electricity. You had a lightbulb, wires, a switch, and a battery. When you completed the circuit, you had light. This is the same thing only in reverse.

You will need to find a AC/DC adapter that you can modify to your laser's positive and negative terminals, but you don't want to overpower the laser, so the AC/DC adapter must also have a step down transformer. You don't want to run that much current through the laser - the wires will melt. Apart from the expense, you'll also probably have to destroy the laser you have.

You're probably better off getting some of those new Energizer batteries for digital cameras. They last a long time. I had one in my mp3 player and it lasted for almost a month. This will be much easier/cheaper, and you won't have to destroy your laser or spend a lot of time cursing at the transformer/adapter.

Answer 3

Plug In Laser Pointer

Answer 4

certain, they're suggested as inverters. They convert DC (from a battery) to 100 and twenty VAC 60~. those oftentimes function from a 12 volt source, both as vehicle battery or from 8-9 alkaline cells (you'll opt for a holder for the cells). you should get one with an output equivalent or more advantageous than the ability score on your gadget. those are expressed in watts. Use of alkaline cells ought to get somewhat expensive as they have restricted power potential that couldn't grant you with a very lengthy run time. they arrive in in maximum digital shops besides as some vehicle furnish shops.

Answer 5

A step down transformer...but finding one that goes from 110 volts to about 3 volts will be hard to find....I would try to find a battery of the same voltage but would last longer, like a lithium battery.

Answer 6

You can't.

Don't give me a thumbs down. I know what you guys below are saying. But to find a 3 volt DC transformer is gonna be hard if not impossible. Then to take a laser pointer apart and wire it to the transformer and then put it back together enough to have it work again is gonna be real hard. If the person asking this question doesn't already know that much it is probably beyond his expertise so I said "you can't"

Answer 7

A step down transformer,a bridge rectifier,a capacitor and a three volt regulator.