Test Results of the Basic NPN LED flasher.

A While ago I posted a circuit, something like this.




1000
___
12V+ -|___|-+--+----------+
| |
| |
| |
| |
| |
| | NPN
| <|
| |-
| /|
--- |
400UF --- |
| .-.
| | |
=== | | 120
GND '-'
|
|
V -> LED
-
|
|
===
GND
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)

And asked about its longevity of the NPN transistor used this way?

Of course, it turned into a three ring circus, so for the last week or
so, I have been operating one using a bench supply and it seems to work
just fine.

I didn't do a beta test on the transistor to see if it lost anything
but I really don't care because this is going to be a permanent use of a
transistors life.

Also, with experimentation I was able to come up with various
configurations that was stable across a wide range of voltages starting
at 11 Volts and up. These make for cheap throw away things.

Jamie