Exact match. Not showing close matches.
'[EE]: modifying black regulator for wider input ra'
Blars Blarson wrote:
> You're right, I hadn't thought through the turn-on conditions
> properly. Thanks for having a look.
> The darlington specs I looked at tended to have vce(sat) higher that
> simple transistors, but I'm sure you are right about them being better
> than my attempt.
In fairness your approach IS the best way, ie
to drive Q1 base with a constant current ON
level independant of input voltage. Just the
way you configured Q2 regulator wouldn't do what
It's easy enough by adding a 4th transistor,
but if you figure a way to do it without the
extra part that would be great and I don't mind
building and testing it if you come up with a
good solution. :o)
http://www.piclist.com hint: To leave the PICList
More... (looser matching)
- Last day of these posts
- In 2002
, 2003 only
- New search...