DIY resistor calculator

[stevetexas]

I just found these - it will help with those pesky resistor calculations  

(scroll down past the ads)

http://www.metku.net/index.html?path=mods/ledcalc/index_eng
http://www.ledcalc.com/
http://www.ledcalc.com/#calc

 

[Daedal]

This should be a very handy trick rather than try and guess it. But I'm sure every battery is different with the supplied current and thus caution should always be exercised

GL;
DDL