[問題] 用訊號做電路開關?
是這樣子的
想請問如何透過訊號來控制電路
有 9V(正極)、0.3V(訊號端)、0V(負極)
要用這個來推動一個光源(光源無法用訊號推動)
想透過9V來供電,訊號端的0.3V來當控制開關
小弟是接電路的新手
想請問大家該如何接以及需要哪些材料
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