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navman28 
Member - Posts: 5
Member spacespace
Joined: October 28, 2009
Posted: October 29, 2009 at 9:50 AM / IP Logged  
Can I use the 25 ohm pot and then wire in a few 100 ohm in line resistors to the output side?  Would that work too?  The 5k ohm is the lowest I can get that readily available.  I figure five 100 ohm resistors should work.
oldspark 
Gold - Posts: 4,913
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Joined: November 03, 2008
Location: Australia
Posted: October 29, 2009 at 10:31 AM / IP Logged  
Yes - but you'll only vary the current by about 25 in 500 - ie, 1:20 = 5% variation (ie, 25 variable in 5 x 100).
navman28 
Member - Posts: 5
Member spacespace
Joined: October 28, 2009
Posted: October 29, 2009 at 11:25 AM / IP Logged  

I just installed a 5k ohm and it seems to be working and not overheating.  Thanks for all the help.

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