Illumination Controller (3)

Published:2011/7/5 23:45:00 Author:Sue | Keyword: Illumination, Controller | From:SeekIC

When the working power is on, the thyristor V3 is the first to be connected(because V3's base bias resistance value is lower than V1's and V2's), its collector becomes low level. Because capacitor C4's voltage can't realise abrupt change, and V2's base voltage is close to 0V, V2 is disconnected. V2's collector has high level. The thyristor VT2 is connected and the 2nd circuit of illuminations HL2 are illuminated. V2's collector's high level makes V1 connected through C3. V1's collector has low level and VT1,VT3 are disconnected. The 1st circuit of illuminations HL1 and the 3rd circuit of illuminations HL3 are not illuminated.



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