An improved discretionary current input circuit includes a switch sensing an operating condition of a tractor and having a first state if the operating condition is not satisfied and a second state if the operating condition is satisfied, and a microcontroller that deactivates at least one function of the tractor if the switch is in the first state. The switch draws a nominal current except during specified time intervals that are shorter than the time for drawing the nominal current. A power transistor is connected through a diode and resistor to the switch. The power transistor normally is in an off condition, and is powered during the specified time intervals to an on condition to increase current above the nominal current to a threshold through the switch. The microcontroller reads if the switch is in the first state or the second state only during the specified time intervals, and uses a timer circuit to determine a duration of each of the specified time intervals such that the power transistor is turned off before the end of a task interval of the microcontroller.
Discretionary current input circuit
2024-01-09
Patent
Electronic Resource
English
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / A01D Ernten , HARVESTING / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01H Elektrische Schalter , ELECTRIC SWITCHES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen |
Discretionary Defense Spending
NTIS | 2010
|Online Contents | 1998
JSC director's discretionary fund program
NTRS | 1991