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Test Results of the Basic NPN LED flasher.

Discussion in 'Electronic Design' started by Jamie, Oct 16, 2011.

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  1. Jamie

    Jamie Guest

    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
     
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