help for ddl's driver

[natabata]

hi guys i've been reading on these forums for a while and have finally chosen to make a red burner(cheapness), so ibought all the components for ddl's driver, ordered a pre-fit diode in an aixis module from senkat(stonetek) and now theres only 1 thing i dont get with the ddl driver, what leads are which on the pot, especcially
my pot looks like this

 

[Chris.]

Just check with a multimeter. With all my 3 pin pots, two of them are inversely proportional.
e.g.
All the way clockwise might be Max resistance on one pin, minimum on the other.
(Might just be my maplins pots though)

 

[natabata]

well i dont have a MM, i thought mybe some1 had experience with such a pot

 

[rog8811]

Outside contacts are the 2 ends of the track, the middle one is the wiper (the bit that moves inside). As drawn turning clockwise will increase the resistance.

Regards rog8811

 

[Chris.]

I'll add that a MM is pretty much inextricably linked to making a DIY laser though, you can get one for £7

 

[knimrod]

All potentiometers are pretty much the same...

 

[natabata]

thanks alot for the fast replys, im gonna try this out right now

 

[rog8811]

I'll add that a MM is pretty much inextricably linked to making a DIY laser though, you can get one for £7

Could not agree more with Chris, it would be money well spent..... before you put your LD into the circuit you should test that it is doing what it is meant to.

Testing thread here...

http://www.laserpointerforums.com/forums/YaBB.pl?num=1197651171

Regards rog8811