I am using a Parallax Melexis 90217 Hall-Effect Sensor (from Robotshop.com) and a 16x2 alphanumeric LCD (from the Arduino Starter Kit) both work correctly form previous tests. The magnet is a strong Neodymium Magnet.
What I want to do is print HIGH to the LCD when a magnet is present and print LOW when there is no magnet present. It is like a read out whether or not a door is opened or closed (LOW or HIGH).
Right now when the magnet is passed over the sensor it has no effect, the LCD continues to print LOW. The LCD only changes to HIGH when I remove the orange and black wires attached to the hall effect sensor and goes back to LOW when I plug them back in. My wiring and code is a combination of an LCD tutorial and a Hall Effect tutorial so maybe that’s why it does not work effectively.
Any help on the coding/wiring is greatly appreciated!
Here is a download link of my wiring schematic the same schematic is pictured below:http://fritzing.org/media/fritzing-repo/projects/l/latch-sensor-hall-effectlcd/fritzing/latch_halleffect_lcd.fzz