Please consider this an endorsement for the lm334z chip It's very well behaved but remember to use it with temp compensation ( the addition of two diodes and another resister ) if possible ...otherwise use with one resister ... At least you should get started... Refinements can come later....
Sent from my iPhone On 1 Sep 2013, at 22:26, "Steve" <youngs...@digis.net> wrote: > Joe, > > Either diode will work fine. Or, you can use a LM334Z constant current > regulator. The LM334 is much cheaper and more plentiful, and only requires a > single resistor to set the current. I buy mine from Jameco (www.jameco.com), > part number 23739. Download the data sheet (free) to see how it works. A 75 > ohm resistor will give you about 1 mA. > > Steve Y. > From: silver-list-requ...@eskimo.com [mailto:silver-list-requ...@eskimo.com] > On Behalf Of Joe Huard > Sent: Sunday, September 01, 2013 2:27 PM > To: silver-list@eskimo.com > Subject: Re: CS>help with diode > > Yes; you're right! > Thanks for the correction. > Still, no one answered my question. Is a Maximum Limiting Voltage of 1.7 V > good enough, or do I need to search for a diode that goes to 5 volts? > > There are only 2 current limiting diodes at 1mA, and the Max. Limiting > Voltage is only 1.7 V. > http://ca.mouser.com/Semiconductors/Discrete-Semiconductors/Diodes-Rectifiers/Current-Regulator-Diodes/_/N-ax1ml?P=1yzrlz3Z1z0rzzo > > Do I need to get at least 5 Volts? > > Joe > On 01/09/2013 3:35 PM, asif nathekar wrote: >> Im sure it was 1ma per square INCH >> >> I actually use 0.2/0.1 ma per square inch for much better and easier >> results.... >> >> It takes longer but its worth it... High likelihood of having Higher Ionic >> content. >> >> >
