Illumination Controller (18)

Published:2011/7/6 1:18:00 Author:Sue | Keyword: Illumination, Controller | From:SeekIC

When the ac 220v power is on, VT1 is triggered to be connected. The first group of illuminations HL1 are the first to be illuminated. The ac voltage between VT1's 2 main electrodes will charge C1 after it is rectificated by VD1 and limited by R1. When C1's voltage reaches a certain value, VT2 is triggered to be connected. The second group of illuminations HL2 are illuminated. The ac voltage between VT2's 2 main electrodes will charge C2 after it is rectificated by VD2 and limited by R3. When C2's voltage reaches a certain value, VT3 is triggered to be connected. The 3rd group of illuminations HL3 are illuminated. The ac voltage between VT3's 2 main electrodes will charge C3 after it is rectificated by VD3 and limited by R5.



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