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Old 10-29-2009, 10:32 PM #1
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Default noob help

hi guys im new here and iv been reading a lot on the forum and just wanted to ask a few questions on my first laser build

i want to make a labby laser first in a project box using a dc power jack and a power pack that i can plug in to my wall to power my laser>>>(open can diode w/rkcstr driver 420ma)

but one thing its 12voilts is there anyway i can get it down to 6v to 7v with a resistor or something ?

or do they make 6v power packs i can buy that will work with a size M dc power jack any help would be awesome


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Old 10-29-2009, 11:57 PM #2
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Default Re: noob help

You'll get an answer pretty quickly on here soon. I'm not the best one to advise you myself but you could always have something that takes an equal 6 volts as part of the entire circuit to reduce the voltage that way. Maybe a light to show that its on
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Old 10-30-2009, 12:00 AM #3
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Default Re: noob help

Quote:
Originally Posted by darkshadow View Post
hi guys im new here and iv been reading a lot on the forum and just wanted to ask a few questions on my first laser build

i want to make a labby laser first in a project box using a dc power jack and a power pack that i can plug in to my wall to power my laser>>>(open can diode w/rkcstr driver 420ma)

but one thing its 12voilts is there anyway i can get it down to 6v to 7v with a resistor or something ?

or do they make 6v power packs i can buy that will work with a size M dc power jack any help would be awesome
You could just buy a 6V DC Power Adapter, not sure what a size M dc power jack is though.

If you wanted to convert 12 V DC to 6 V DC you could use a litlte voltage regulator circuit, they are pretty easy to build. I like the LM317 voltage regulator.

variable voltage regulator circuits, LM317

thanks,
Kendall
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Old 10-30-2009, 12:34 AM #4
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Default Re: noob help

to the Forum...

I suggest taking your size M dc power jack with you when you
purchase a 6 Volt AC adapter (wall wart)..


Jerry
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Old 10-30-2009, 12:45 AM #5
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Default Re: noob help

thanks guys ill go to the store and see what i can fine, sk8er4514 thanks for the link also
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Old 10-30-2009, 01:45 AM #6
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Default Re: noob help

Quote:
Originally Posted by darkshadow View Post
thanks guys ill go to the store and see what i can fine, sk8er4514 thanks for the link also
Told ya you'd get a fast enough reply. This is a great message board
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Old 10-30-2009, 02:01 AM #7
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Default Re: noob help

Resistors and zenor diodes or a 7806 regulator can be used BUT heatsinking would be needed. Look for a 6 volt wall wart with sufficient current rating. You can always solder on a new connector.

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Old 10-30-2009, 03:20 PM #8
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Default Re: noob help

great.....ill see if i can find something that would be good to use or run by radio shack and see what they have

Last edited by darkshadow; 10-30-2009 at 03:30 PM.
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Old 10-30-2009, 03:41 PM #9
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Default Re: noob help

Well, since the rksctr is a linear driver, you could always calculate it's Thévenin's equivalent and then just using a Tension Splitter with the driver as one resistor. This way you'll only need a pot!

Am I wrong?

Thévenin's theorem - Wikipedia, the free encyclopedia

Yours,
Albert
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Old 10-30-2009, 03:48 PM #10
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Default Re: noob help

would this work ? 6V/1800mA AC-to-DC Power Adapter - RadioShack.com

and if the end does not fit i can always solder on a correct connector
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Old 10-30-2009, 04:20 PM #11
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Default Re: noob help

They sell DC power adapters that have a selector switch so you can choose your power options of; 1.5, 3, 6, 9,or 12 Volts DC. They are also equipped with a polarity switch, so you can switch your polarity to whatever you choose. You can find them almost anywhere (WalMart, Walgreens, Sears) etc. for about $10.00 -$15.00. I have several for running different items in my house. I think they're great, 'cause you can use them to run items that use different voltages just by changing the voltage selector switch. They also come with about 5-6 different jack sizes for the plug in, including the dual 9 Volt jack.............rob
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Old 10-30-2009, 04:28 PM #12
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Default Re: noob help

sweet.........thanks phoenix77 and to every one else, ill go to WalMart and se if they have that. I think that would be good so i can use it for many different things
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Old 10-30-2009, 04:34 PM #13
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Default Re: noob help

N/P darkshadow, this Forum is THE BEST place to get your ???'s answered for anything involving lasers, electronics, etc. We have some real geniuses here, (unfortunately I'm NOT one of them, LOL) but a lot of the members here really know their stuff. Just ask & ye shall receive !!!!! Glad I could be of service...........anytime, rob
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Old 10-30-2009, 04:55 PM #14
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Default Re: noob help

u got that right.....there are very nice people here and they are a great help...well im off to get my goods lol
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