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README.md

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AWANA Timing system for MVBC Tucson AWANA club.


Circuit

  • PhotoTransistors are placed under the lanes and are pulled down at the sensor.
  • All sensors go into comparators that are comparing the voltage of the Potentiometer.
  • The out put of the comparators are pulled up and fed into the the arduino nano every.
  • The starting hall effect sensor is placed on the end of the electro magnet.
    • That sensor is plugged into the phone cable.

Arduino

  • The arduino is running PORTRead.ino which is reading the virtual port and outputted into the serial buffer.
  • PORT reading is simply reading 8 pins at the same time.
  • VPORT is the chip on the nano every making reading the port a one cycle operation (it go burrr).

Raspberry pi

  • Reads the buffer and calculates if the gate has stared or if the car has passed over the line.
  • Displays the information on the hdmi output.