the light emitting diode 20 contact 1 and contact 4 touch to complete a circuit that provides negative voltage to the cathode of the green side 26 of light emitting diode 20 and contact 24 and contact 3 make contact to complete a circuit that provides negative voltage through transistor q 1 30 to the cathode of the red side 25 of light emitting diode 20 the user must turn the bottom section clockwise into the top section until the red side 25 illuminates then the float is in operation the red light glows because current flows from the negative side of battery b 1 31 through contacts 6 and 3 and 24 to the emitter of transistor q 1 30 out the collector of transistor q 1 30 and through resistor r 3 29 which limits current flow and through light emitting diode 20 red side through spring contact 2 and back to the positive side of the battery b 1 31 when the fishing line is pulled for example when a fish bites downward pressure is applied via line and ring 12 through a longitudinally drilled hole in nut 10 and bolt 11 to spring contact 7 which makes contact with contact 8 providing a circuit for current through contacts 1 and 4 to resistor r 1 27 a negative potential voltage is imposed across r 2 28 upon the base of q 1 30 which shuts.