I need to be able to reprogram some devices in the field and a JDM style
programmer seems to be the ideal solution.  Cheap and just a bump in the
serial cable type of device.

Only problem is that the notebook serial port have enough voltage to
tickle MCLR and put the PIC into program mode.  I measured about 10.5VDC
using one notebook that I have here.  Using the same notebook but a USB
to RS232 adapter gave me a voltage of about 12.5VDC.  Closer - but still
not quite there.

So - does anyone have any suggestions on how I can boost the voltage for
MCLR.  Is it possible/practical to add a battery to get me to the
correct voltage?  I would like a solution where I don't need a power
supply that I have to get AC power to as my programming locations may
not have that available.  I am guessing that someone else has run
into (and hopefully solved) this problem.  If there is and they can share
their circuit I would appreciate it.

I poked around the FAQ and the archives but haven't found anything.

Thanks,
Dan Oelke

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