In this simple circuit, the reader can learn the relationship between the voltage and LED brightness.
1.5V battery x (from 2 to 5)
LED x 1
The right side is the voltage applied to LED anode. The left side is the voltage applied to LED cathode.
- 讓正負極的電壓相同。(The voltage between anode and cathode is equal.)
- 讓正極的電壓大於負極。(The anode voltage is higher than the cathode voltage.)
- 讓正極的電壓小於負極。(The anode voltage is lower than the cathode voltage.)
Please observe the relationship between the voltage and LED brightness during the experiment.