Electricity: power supply or regulation systems – Input level responsive
Patent
1988-03-25
1989-05-02
Wong, Peter S.
Electricity: power supply or regulation systems
Input level responsive
323906, G05F 500, H02J 700
Patent
active
048272060
ABSTRACT:
A solar power system for an electronic parking meter. At least one solar cell array is connected to the anode of a first diode and at least one current regulating diode has its anode connected to a cathode of the first diode. At least one storage capacitor is connected between a cathode of the current regulating capacitor and ground. At least one second diode has its anode connected to the storage capacitor and has its cathode connected to an input of a voltage regulator. An output of the voltage regulator provides a supply voltage for the electronic parking meter. The input of the voltage regulator is also connected to the cathode of the first diode. A monitor circuit monitors a voltage level at the input of the voltage regulator. A microprocessor is connected to the monitor and when the voltage level decreases below a first threshold, the microprocessor shuts down the electronic parking meter in an orderly manner. When the electronic parking meter is shut down, the voltage regulator outputs a reset signal when the voltage level at the input of the voltage regulator exceeds a second threshold level, the reset signal is received by the microprocessor.
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POM Incorporated
Wong Peter S.
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