Retractable Dot Display Level Indicator Composed of SL322

Published:2011/9/12 23:49:00 Author:Sue | Keyword: Retractable, Dot Display, Level Indicator | From:SeekIC

The picture shows the retractable dot display level indicator circuit. The circuit consists of luminescent display drive SL322, LED D1-D5, transistor BG1-BG5. When K is disconnected, the triodes are all connected to the ground. When the level becomes higher which makes the LED D2 illuminated, B's level becomes higher and BG1 is connected which will make the LED D1 off. When the level becomes higher which makes D3 illuminated, C's level becomes higher which makes BG2 connected, and D2 will be off. At this time, B's level doesn't change and BG1 remains disconnected. D1 is still not illuminated.



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