Irrigation controller with analog data input devices

Details Irrigation controller with analog data input devices Irrigation controller with analog data input devices

1993-12-21

1995-05-09

Envall, Jr., Roy N.

Boots, shoes, and leggings

364142, 364145, 239 70, G06F 1546

Patent

active

054146186

ABSTRACT:
An improved irrigation controller of solid state design utilizes a microcomputer which retains and executes a watering schedule. A plurality of analog data input devices are provided with one input device being assigned to input one value of at least one watering schedule parameter having a number of possible values. Each analog data input device comprises a potentiometer, connected between high and low reference voltages, which has a variable output voltage determined by the setting or position of the input device on the controller housing, with different output voltages representing different values of the parameter. The output voltage is determined by charging a capacitor using a constant current source and by timing how long it takes the capacitor to reach the output voltage. The same capacitor is used for all of the analog data input devices to remove any variability in how different capacitors charge. In addition, the actual instantaneous high and low reference voltages are also read when the output voltage of at least one analog data input device is read.

REFERENCES:
patent: 4333490 (1982-06-01), Enter, Sr.
patent: 4396149 (1983-08-01), Hirsch
patent: 4567563 (1986-01-01), Hirsch
patent: 4837731 (1989-06-01), Levine et al.
patent: 5193570 (1993-03-01), Mott
patent: 5272620 (1993-12-01), Mock et al.

Affiliated with

Also associated with

Rating

Irrigation controller with analog data input devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Irrigation controller with analog data input devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Irrigation controller with analog data input devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1710674