The current for triggering the protection in the third part of
the schematic was set at about 0.8A. The
protection worked well within the bench circuit but not on the bike,
as there the protection turned out to be extremely sensitive to
humidity. A contributing issue was that on the bench I used an
incandescent lamp rather than a halogen. For an incandescent the
resisitance is pretty stable, around 12 Ohm. However, a cold
halogen has a resistance below 2 Ohm that raises only as the
halogen heats up. Thus, on the bike there was an initial rush
of the current that easily triggered the protection.
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