Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

How to Register on LPF | LPF Donations

which potentiometers for laser spiro.

laserboystuart

laserboystuart

0
Joined
Jan 13, 2010
Messages
708
Points
0
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 :)
 





laserboystuart said:
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 :)
Click to expand...
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
 
Last edited:
already tried with motors... and failed miserably :beer: so i think the fans would be better for me, also do radioshack ship worldwide?... im in the UK.

stuart :)
 
Last edited:
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.
 
hakzaw1 said:
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.
Click to expand...

would i be able to use a 100ohm potentiometer with the fans?

stuart :)
 
laserboystuart said:
would i be able to use a 100ohm potentiometer with the fans?

stuart :)
Click to expand...
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
 
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.
 
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 :)
 
You must log in or register to reply here.


Back
Top