On 5/27/06, Russell McMahon <apptech@paradise.net.nz> wrote:
> Nobody seems to have solved your 'latch on' conundrum.

Really ?

:)

greetings,
Vasile


> You didn't provide quite enough information for us to be sure what you
> are doing.
>
> Can you provide a full circuit of the relevant portion OR describe it
> fully.
>
> How big is the base drive resistor? [[reads more ]] - OK, 1 k
>
> When you turn it off, how do you do it - do you ground the resistor
> input via  PIC pin or  float the driving pin.
>
> It sounds as though you may have base leakage problems BUT the 1 k
> drive should be amply low enough if you are grounding the input.
>
> If you ground the input to the 1K resistor when the large solenoid is
> on, does it till stay on?
>
>
>        Russell McMahon
>
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