Tinkercad Circuits：簡易電路 LED 兩端不接地(Light up a LED without the ground)

透過此簡易的電路設計，可以了解到電壓與LED亮度之間的關係。 In this simple circuit, the reader can learn the relationship between the voltage and LED brightness.

材料(Materials)：

1. 5V battery x (from 2 to 5)
2. LED x 1

電路(Circuit)：

上圖右方是LED正極的電壓；上圖左方是LED負極的電壓。 The right side is the voltage applied to LED anode. The left side is the voltage applied to LED cathode.

我們可以做底下的實驗(The Experiments)：

1. 讓正負極的電壓相同。(The voltage between anode and cathode is equal.)
2. 讓正極的電壓大於負極。(The anode voltage is higher than the cathode voltage.)
3. 讓正極的電壓小於負極。(The anode voltage is lower than the cathode voltage.)

進行實驗時，請觀察LED的亮度與正負極電壓之間的關係。 Please observe the relationship between the voltage and LED brightness during the experiment.

示範影片(Demo Video)：

範例連結(Example Link)：

https://www.tinkercad.com/things/9H5rd83QEir-led-#/

Originally published at yunlinsong.blogspot.com on April 6, 2018.