piclist 2004\07\02\085055a >
Thread: Driving ATtiny11 with 9v battery
www.piclist.com/techref/power/batterys.htm?key=battery
flavicon
face BY : David VanHorn email (remove spam text)



>
>To guarantee that datasheet spec is met for the L part (and guaranteeing
>that datasheet spec is met is an essential part of acceptable design), you
>could allow the battery to go from 9v6 down to 6v8 IF the zener knee was
>100% square.

Zeners have bad knees.
Worse, as the current goes down, the knee gets worse, and the Vz changes.


> While it MAY be OK to run a blink-a-LED program with such a
>widely varying supply, the savings of a few cents in the power supply is
>exposing beginners to a range of other factors which may confuse and
>mislead.

Bingo.

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.

<5.1.1.6.2.20040702074408.01bbf2e0@mail.cedar.net>

In reply to: <035a01c46006$c60c4660$7c01a8c0@y2k>
See also: www.piclist.com/techref/power/batterys.htm?key=battery
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Driving ATtiny11 with 9v battery

month overview.

new search...