On 27 Sep 2006 06:13:29 -0700, "Telstar Electronics"
wrote in
.com:

wrote in
Then show me the circuit that worked.


Frank Gilliland wrote:
Regarding the parallel circuit, I'll save myself the effort of digging
the scanner out of the closet; Here are a couple literary references
from my bookshelf that you can probably dig up at your local library.
Both of them have circuits that utilize the same parallel arrangement
in one form or another:

Motorola Power Transistor Handbook, 1961 (and probably other years)
(see section on power inverters)

Electronic Circuit Design Handbook, EEE Magazine, 1971-74 (several
different circuits in various sections)

If you can't find those books, can't find any references yourself, and
can't figure out how to set up a simple test circuit to verify its
operation, let me know in a month or so when the weather goes sour and
I'll have more time to spend on your education.

No, don't want to see those. I want to see the exact circuit that you
said you tried and it worked.


Vcc
|
|
|R|
|R|
|R|
|
______|_______
| a |
_|_ _|_
\ / D1 \ / D2
_V_ _V_
| |
| |
__|__ __|__
___ ___
_ _


1. Measure voltage at point (a) with respect to ground.

2. Heat D1 with a soldering iron. Watch voltage drop.

3. Let D1 cool. Watch voltage go back up.

4. Heat D2 with a soldering iron. Watch voltage drop.

5. Let D2 cool. Watch voltage go back up.


Thus endeth electronics lesson for today.