| 摘要 |
PURPOSE:To provide an easy-to-handle switch and prolong its lifetime by changing over a lighting circuitry of an illumination fixture by the use of a decade counter, in which output terminal is changed over at every touch on a soft touch switch. CONSTITUTION:A decade counter 21 has a plurality of output terminals Q0, Q1, Q2, Q3, Q4, among which the one Q0 is connected with the bases of switching transistors 22, 23 to light up a fluorescent lamp 12 in full lit state by the first touch motion. Diodes D2, D3 connected with the leads of the output terminals Q0, Q1 are to prevent color mixing of signals, and dimmed lighting is given by the second touch. The output terminal Q2 is connected with another switching transistor 24 and an LED 28 for display of the operation, and a secu rity bulb 9 and the LED 28 are lighted by the third touch. The output terminal Q3 is connected with the LED 28, and the illumination fixture 1 is put in off condition by the fourth touch. |
