Re: DRL problem

Hi Andre

I have seen the posts regarding your DRL problem...

As far as I am concerned, people that roll their own design should know and
understand what and why they want to change things.  There are 100s of
things that you could have changed and without a schematic you are asking
the community to guess.  I normally don't bother getting involved in these
discussions.

Why the LF412?  Do you have a whole box of them lying around?

There are literally 100s of different opamps around, and believe me, there
is a REASON for that, otherwise we could simply plug in a LM301, LM741 or
CA3140 into every design and be done with it.

I remember the LF412, but I didn't even have the datasheet in my long, long
list of devices and had to download it again.  The datasheet says Vmin is
+3.5V and -3.5V.  So in other words, it needs a minimum of 7V supply
voltage.

ModEEG runs with 5V and I doubt if you decided to increase the supply rails
in whatever hack you are doing.

How a LF412 will behave when running from a 5V instead of 7V (min) supply
is anyone's guess!  All the internal current sources will likely be screwed
up due to insufficient voltage, thus the saturation problem.

No further comments from me.

Regards
Stefan

------------------------------------------------------------------------------
Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester  
Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the  
endpoint security space. For insight on selecting the right partner to 
tackle endpoint security challenges, access the full report. 
http://p.sf.net/sfu/symantec-dev2dev