On Fri, 23 Aug 2002, Brendan Moran wrote:

>Here's my favorite.  Limited only by the forward voltage of the power
>transistor, and the accuracy of zener you can find.

That circuit will destroy the zener diode and/or the thyristor gate when
an event occurs and it will have 0.6V voltage drop through the transistor,
dissipating power. It is not self resetting (it could be with that parts
count). Just an opinion.

Peter

>
>-------+-----------C   E----
>       |             B
>       +---/\/\/\/---+
>       |             |
>      ---           ---
>      /Z\ Vz = 5.x  \ / SCR
>      ---           ---
>       |            /|
>       |           | |
>       +-----------+ |
>       |             |
>       /             |
>       \             |
>       /             |
>       \             |
>       /             |
>       |             |
>-------+-------------+-----
>
>If I need to explain what any of that is, just tell me.
>
>--Brendan
>
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