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Power Member
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注意!!!!!!!!!!!!!!!!!!!!!!!!!
用可變電阻做中央抽頭的原理我說一下好了,可變電阻有3隻腳,中間那知識抽頭.
VRP1 接AC的一端,VR2中央抽頭接馬達或燈泡,VRP3接AC的另一端.
VRP2輸出電壓 = AC x (R(VRP2VRP3/( VRP1VRP2 + VRP2VRP3)))
vo = vi (r2/r1+r2)
當R2很小時,如果功率不夠,會燒掉的!!!!!!!!!!!!!!!!!!!!!
會爆!!!!!!!!!!!!!
並起火花!!!!!!!!!!!!!!
不懂的人請不要這樣接.
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