APF Spectrograph Electronics
Board Designs
Triple Haff-Effect Limit Board, 
EL-1393
Schematic: schematics/APF/boards/limit_board.pdf
Page last updated: February 8, 2012
Simplified Drawing
The EL-1393 circuit board simply contains 3 Cherry VN101501 digital vane switches. These switches are spaced at 0.8" between forward and reverse limit and 1.0" between the reverse limit and Home sensor. The board has a 6-pin connector, J1, that supplies +5V and GND and four output pins. The outputs correspond to the three sensors and a limit connected signal. The LIM CONN signals the controller if for any reason the connector has been disconnected.
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