8 Apr
2012
8 Apr
'12
2:45 a.m.
On 08/04/2012 10:08, Rob Jarratt wrote:
Thanks for the procedure for testing the Darlington
transistors. One thing I
wanted to check though. You say that the collector should be connected to
the negative pole of the battery, I thought that, conventionally at least,
collectors were connected to the more positive side and emitters to the
negative?
It depends not on convention but on polarity, and therefore on whether
the transistor is NPN or PNP. NPN is more common in many areas, but
TIP125 is PNP.
--
Pete Peter Turnbull
Network Manager
University of York