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SENSOR BOARD
1. Hall Effect Sensor (IC1): The Hall effect sensor is a special device that is sensitive to
magnetic flux. The sensor gives a DC voltage on one of its pins in proportion to the amount
of magnetic flux it senses. Because the magnetic flux of a magnet is proportional to distance
from the magnet, these devices are often used as distance sensors in industrial applications.
Hall effect sensors are polarized, so be mindful of how you install it. Push the component into its
holes with the smaller face of the sensor closest to the letters “IC1” printed on the board (88). Push
down until the body of the sensor is about 1/8” (3-4 mm) above the top of the board. Then bend
the body back against the board (89). The body of the sensor should be inside the box labeled
“LAY FLAT.” Bend the leads back on the bottom of the PCB in the same direction; it is important to
make sure the body of the sensor lays flat against the top of the PCB (90). Solder the leads on top
of the board (91). Clip the leads on the bottom of the board.
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