Combination light unit and battery monitor device

Details Combination light unit and battery monitor device Combination light unit and battery monitor device

1990-02-12

1992-04-14

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

320 48, 324435, 354468, G08B 2100

Patent

active

051051800

ABSTRACT:
A light unit is combined with circuitry which monitors the charge level of a battery of the light unit or a video camera or camcorder connected to the light unit. With two lights of different wattages, three different constant loads can be applied while observing, in each case, LED indicators each deenergized at a certain voltage level, resulting in an accurate and reliable indication of charge level. The voltage levels are selectable in accordance with the type of battery being monitored and a bridge rectifier allows reversal of battery polarity.

REFERENCES:
patent: 4126874 (1978-11-01), Suzuki
patent: 4131351 (1978-12-01), Iwata et al.
patent: 4338596 (1982-07-01), Huber et al.
patent: 4376265 (1983-03-01), Kiuchi et al.
patent: 4660027 (1987-04-01), Davis
patent: 4792762 (1988-12-01), Shiina et al.
patent: 4906055 (1990-03-01), Horiuchi
patent: 4982220 (1991-01-01), Akasaka

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