>     Someone can point me how can I connect the two? May I use it the
> Darlington's way?

I doubt there are any laws against it, but I wouldn't.  Just cascade the two
resistors.  PIC drives base of Q1.  C of Q1 to +5V.  E of Q1 to B or Q2 thru
resistor.  E of Q2 to ground and C to solenoid.  Adjust resistor to obtain
suitable base drive for Q2.  Note that the voltage accross the resistor will
be 5V minus the two B-E drops, or about 3.6V.  The rest is Ohm's law.  Also
add a relatively large value resistor from Q1-B to GND.  Its only purpose is
to prevent small leakage thru Q1 from going thru Q2.  10Kohm should be fine.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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