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触摸感应调光开关广泛用于台灯的调光,但用作壁板开关却不能正常使用,原因是电路的供电问题没有很好解决。在台灯上运用时,开关使用三线制,即开关电路并不完全与灯泡串联工作,电路的供电不受灯泡明暗的影响,采用电阻降压方式可以简单地得到稳定的供电。如果用作壁板开关,整个开关电路必须与灯泡串联工作,电路的供电直接受到灯泡明暗的影响;为使开关稳定工作,供电电路要按照灯泡最亮时设计;壁板开关要求体积小,发热少。
Touch-sensitive dimming switch is widely used for lamp dimming, but can not be used as a sconce switch, because the power supply circuit is not a good solution. When used on a desk lamp, the switch uses a three-wire system, that is, the switch circuit does not completely work in series with the lamp. The power supply of the circuit is not affected by the light and darkness of the lamp bulb. The stabilized power supply can be obtained simply by using the resistor step-down method. If used as a wall switch, the entire switching circuit must work in series with the bulb, the power supply circuit directly affected by the light and shade; To make the switch stable work, the power supply circuit in accordance with the brightest light bulb design; wall switch requires small size, fever less.