Hi, Roman

   For the extreme guys like you falling once is never enough :-) I agree
with you, life has to be intense.. Most of us on the list get this intensity
with blowing transistor and mounting PIC's backwards ;-) If you can't drop
it than be more carefull. We like to have you around. Your sore back can get
great web pages done but try to keep it in one piece.

> I lost Russell's 3-transistor circuit, if that's
> the one you're referring to, I will add it to the
> page if someone can email it to me.
>
> Just from curiosity, why Russell's circuit for the
> higher voltages?
> -Roman

    Not higher voltages but higher currents and short circuit protection. I
will catch it on my archives and send you the email. For the 24 volts I am
very tempted to use a PWM output driving a high side bipolar drive. I will
just switch solenoids with it. For the 5 volts I will probably use your
circuit adding one more transistor to get lower ripple and using a higher
voltage rating swithing transistor. I think BD459 will get me up to 200
volts with reasonable gain. I will check it out.

Best regards,
Alexandre Guimaraes

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