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Old 05-13-2010, 09:18 PM #1
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Default which potentiometers for laser spiro.

hey everyone, i am building a laser spirograph soon and was wondering which potentiometers to use to control the fans.... i have 3 12v fans that draw 220mA each. so what potentiometers could i use to control them?

thanks,
stuart


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Originally Posted by AAlasers View Post
Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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Old 05-13-2010, 11:17 PM #2
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Default Re: which potentiometers for laser spiro.

i used this,
25-Ohm 3-Watt Rheostat - RadioShack.com
But for motors i would say go normal dc motors not fans, and get 2 of these
3-Pack Toggle Switch Kit - RadioShack.com
This will let you turn off 2 motors and get a tunnel effect or change the direction to get many more patterns.
Make sure to add caps across the motors to keep thing more stable. i forget the size but around 16uf i think
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Old 05-14-2010, 12:48 AM #3
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Default Re: which potentiometers for laser spiro.

Quote:
Originally Posted by laserboystuart View Post
hey everyone, i am building a laser spirograph soon and was wondering which potentiometers to use to control the fans.... i have 3 12v fans that draw 220mA each. so what potentiometers could i use to control them?

thanks,
stuart
If these are fans like the ones from PCs they are not reversable. Many more efx can be done if you can reverse and slow down your motor/mirrors. IIRC - you should get DPDT Switches that will allow you to both stop and reverse your mirrors instead of just off and on.--hk
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Last edited by hakzaw1; 05-14-2010 at 12:55 AM.
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Old 05-14-2010, 05:02 PM #4
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Default Re: which potentiometers for laser spiro.

already tried with motors... and failed miserably so i think the fans would be better for me, also do radioshack ship worldwide?... im in the UK.

stuart
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Quote:
Originally Posted by AAlasers View Post
Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?

Last edited by laserboystuart; 05-14-2010 at 06:00 PM.
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Old 05-14-2010, 05:42 PM #5
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Default Re: which potentiometers for laser spiro.

I cut the blades off my fans- not needed and they tend to ruin the 'whispy' efx of my fogger. Fans work great for tunnel and liq. sky--but for Liq. sky don't wasre yr time trying to mount more than one FS mirror as you will just get more than one line- not a cool as just one....also I paint the back and edges w/ flat black paint - makes a better cleaner line.
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Old 05-14-2010, 06:01 PM #6
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Default Re: which potentiometers for laser spiro.

Quote:
Originally Posted by hakzaw1 View Post
I cut the blades off my fans- not needed and they tend to ruin the 'whispy' efx of my fogger. Fans work great for tunnel and liq. sky--but for Liq. sky don't wasre yr time trying to mount more than one FS mirror as you will just get more than one line- not a cool as just one....also I paint the back and edges w/ flat black paint - makes a better cleaner line.
would i be able to use a 100ohm potentiometer with the fans?

stuart
__________________
445nm jayrob 18650 @ 900mA 946mW---->Sold... Review Here!
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PM MORGAN FOR HIGH QUALITY LASER BUILDS HERE


Quote:
Originally Posted by AAlasers View Post
Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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Old 05-14-2010, 06:22 PM #7
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Default Re: which potentiometers for laser spiro.

Quote:
Originally Posted by laserboystuart View Post
would i be able to use a 100ohm potentiometer with the fans?

stuart
From what I read- not so well-- GreenM says the old style ceramic rheostats do work but are both harder to find and more expensive--only one on feeBay is $18 or best offer. Motor controllers can be gotten in kit form and ready-to-use for about the same. Dakota is working on building some so PM him. I am sure many can DYI as well
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Laserking RGB LK PD2 500 and LK SD 850
REKE RGB 500- G 300
HeNes-(12)R(3)G-COH-594/5 mW-thnx DrSam
MULTILINE-147mW[
445nm 180mW-Mini spiro-Yob.
LPMs-RadiantAlpha& Pro5W-AixiZ SPER/KenmeterLite/LB1
Spacelas 1178mW 655nm/AixiZ 300mW532&
2 B&W 473nm 5/6mW lab
JETLRS1.3W&1.2W-MGL-H
638 180mW ttl mimi lab (av. 230mW)
405 100mW ttl mini lab
445 300 mW ttl mni lab ^AixiZ^ all for a lumia PJ
*MightyMite 2000* RGB all diode 2.2W 30K- 637/520./450...NEW!!
Guide DIY Pjs by Dan-
http://nqlasers.com/scannerreference/index.php?title=Main_Page
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Old 05-14-2010, 06:32 PM #8
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Default Re: which potentiometers for laser spiro.

do buy anything from the crap shack i use them as a reference for you to go to your local supplier or eBay-china and order a similar item. you could try a 100ohm pot nothing bad will happen.
i would tell you you will get tons more patterns if you can get motors that are reversible.
Just buy a cheap dc motor and a gear then glue the mirror to the gear with a light offset. very quick and cheap.
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Old 05-14-2010, 06:38 PM #9
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Default Re: which potentiometers for laser spiro.

i think im just going to buy one off dakota when i get some money, got to get an LPM (HLPM-II) from lasersbee first

stuart
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Quote:
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Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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