Showing papers on "Light pillar published in 1998"

Colour changeable light pillar indication alarm instrument

Abstract: The utility model discloses a color changing light pillar indication alarm device. A casing of the device is provided with a color changing light pillar circuit board which is composed of two rows of LED tube cores with different colors, and a purpose-made grating face board, and the poles of the two rows of tube cores share one cathode or one anode. Through the arranged drive circuit, the utility model can individually control the LED tube cores with different colors within the set value range, that is to say, the light pillars with different colors can be displayed on the purpose-made grating face board according to the set range value, thereby, the purpose of alarm is obtained.

Light pillar digital double-display mounting electricity meter

Abstract: The utility model relates to a light pillar digital double-display mounting electric meter. A light pillar displayer, a digital display circuit based plate and an active power voltage converter module are arranged in the casing. A digital display circuit comprises an analog-to-digital converter, the emitter follower of a decoder power triode and a digital character displayer. The light pillar display circuit comprises a preamplifier, a comparison display network, and a reference level generator. A measured AC power passes through a P/V converter, and the AC power can be converted into a DC level. The DC level can pass through the light pillar display circuit and the digital display circuit, electrical signals can be converted, and two displays of light pillar and digits can be observed through the transparent window arranged at the front of a panel.