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Issue 1.0 16/12/99
5.3Hall Effect PCB.
Introduction. The Hall Effect PCB is a generic item which can be used for both
Tillerpilots TP10, TP20 and TP30 and Wheelpilots WP10 and WP30. For Tillerpilots,
the Hall Effect devices are mounted vertically into the PCB and horizontally for
Wheelpilots. The circuit diagram for the Hall Effect PCB is given in Drawing No.
E03182.
Feedback. Two Hall Effect sensors HE1 and HE2 are mounted on the Hall Effect
PCB and sense the rotation of 2 small bar magnets mounted 1800 apart in the pulley
wheel. This produces a quadrature feedback output, at logic levels, FB1 and FB2.
The PCB is powered from the host unit +5V regulated supply, the line being filtered by
C1, and signals FB1 and FB2 are fed back to the microprocessor via pull-up resistors
on the host unit PCB.
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