From what I see of your post, are you not suggesting the 'recommended' setup from National on the LM317 datasheet? (check out www.national.com). I'm just not sure if what you told me is something that I should be applying to my design or not, considering I planned on having a 240 ohm resistor there already (as recommended per the datasheet), and either using a digital pot for adjusting the current to the adj pin, or some other method (which is what I have been asking, but I think I have it answered). I hope I am not mistaking your post. Quoting "Peter L. Peres" : > On Sun, 3 Nov 2002, Jinx wrote: > > *>> Wherever you get that. > > The trick to use a 317 is to set up the current through Radj to at least 3 > times Iadj. This way the errors caused by temperature etc become > negligible. This is done by choosing an appropriate resistor between out > and adj. Since the voltage is constant (nominal 1.2V) you set a current > using the resistor which will flow through Radj. F.ex. 240 ohms is very > popular (5mA nominal ~= 100 times Iadj). Also 2k4 or 2k2 (10 times Iadj). > The bottom line is that the current through Radj will be constant. Note > also the minimum load requirement. 240 and 470 ohms between out and adj > fulfill this requirement, 2k4 does not. > > Peter > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > ---------------------------------------- This mail sent through www.mywaterloo.ca -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics