Abstract: A booster-enhanced power supply for a valve control circuit is disclosed. An inductor repeatedly stores energy from a power source, then discharges it through a diode into a capacitor due to the cycling on and off of a switch. The charged capacitor is used as the power source for changing the state of the valve. The charge stored on the capacitor(s) at any given moment is preferably monitored, and the charging cycle is preferably controlled to optimize the use of the boosting circuit for a given application. The boosted power source can provide a consistent output even when the power source provides an consistent power output even when the power source provides an inconsistent power input.

Abstract: A booster-enhanced power supply for a valve control circuit is disclosed. An inductor repeatedly stores energy from a power source, then discharges it through a diode into a capacitor due to the cycling on and off of a switch. The charged capacitor is used as the power source for changing the state of the valve. The charge stored on the capacitor(s) at any given moment is preferably monitored, and the charging cycle is preferably controlled to optimize the use of the boosting circuit for a given application. The boosted power source can provide a consistent output even when the power source provides an consistent power output even when the power source provides an inconsistent power input.

Abstract: An electronic faucet having a spout, a electronically actuated valve, and a microprocessor-based control circuit for operating the valve to enable or disable water flow through the spout. The microprocessor has a control program which includes a calibration routine that uses an infra-red sensor to determine an adjustable setpoint indicative of the signal received from the sensor in the absence of an object in front of the faucet. The microprocessor switches the valve from its closed state to its open state when the signal from the sensor either increases above the setpoint by a selected amount or decreases below the setpoint by a selected amount. This provides a window about the setpoint within which differences between the setpoint and the signal do not result in opening of the valve. Object detection is accomplished using a tracking routine that adjusts the setpoint in an attempt to track the sensor signal.

Abstract: An electronic faucet having a spout, a electronically actuated valve, and a microprocessor-based control circuit for operating the valve to enable or disable water flow through the spout. The microprocessor has a control program which includes a calibration routine that uses an infra-red sensor to determine an adjustable setpoint indicative of the signal received from the sensor in the absence of an object in front of the faucet. The microprocessor switches the valve from its closed state to its open state when the signal from the sensor either increases above the setpoint by a selected amount or decreases below the setpoint by a selected amount. This provides a window about the setpoint within which differences between the setpoint and the signal do not result in opening of the valve. Object detection is accomplished using a tracking routine that adjusts the setpoint in an attempt to track the sensor signal.