Category: 電路方塊
什麼是電位器？其實它就是一個可變電阻，就像家裡的燈光調光開關一樣。電阻範圍從 0 到 200 歐姆。當您旋轉旋鈕增加電阻時，電位器會消耗更多功率。這會減少電路中 LED 或馬達可用的功率。結果：LED 變暗，馬達轉速變慢。
電位器方塊只是電路的一部分。加上電池來為您的創作供電， 馬達 讓它們動起來，LED讓它們發光，以及開關來掌控一切！
I wired this into a simple LED circuit and the 0-200 ohm range gives me precise control over brightness, just like a dimmer at home. Really helpful for understanding how variable resistors work.
Turning the knob feels smooth and lets me dial in just the right resistance for testing dimmer-style circuits. The 0-200 Ohm range covers most of what I need for small LED projects.
I turned the knob expecting a noisy jump in resistance but it sweeps smooth all the way from 0 to 200 Ohms. My kids use it to dim the LED strip in their room and it hasn't gotten warm or scratchy after a month of constant twisting.
