>  You can 
> see it on page
> > two of the schematic at 
> http://www.embedinc.com/products/qprot01/qprot> 2.pdf.
> 
> sheet2/7 from this design it's a very good 
> prove about what is
> happening if a good software PIC programmer is designing hardware...
> 
> Take a critical look to the Q6, Q4 and Q2 and see the redudancy.

I am probably a programmer, I don't see the redundancy. Q6 brings the
voltage swing up to the 11-38V level, Q4/Q2 give it the muscle to drive
Q3. What is redundant?

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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