Visualize Voltage Doubler Operation using LEDs and Advanced Oscilloscope Techniques

Summary: This video demonstrates a voltage doubler that uses two LEDs as rectifiers. It also shows the individual capacitor voltages measured with differential oscilloscope inputs. Why This Matters: Voltage doublers appear in many low-power supply stages where simple level shifting is required. Understanding the charging paths and ripple behavior helps engineers evaluate practical performance under different excitation frequencies. Content covered in the video: • Circuit layout using two LEDs, two 3,300-µF capacitors, a 100-ohm series resistor, and a 1-kΩ load • Differential measurement of each capacitor using the Analog Discovery instrument • Half-wave charging behavior for the upper and lower capacitors • Summation of capacitor voltages to form the doubled output waveform • Comparison between input frequency and output ripple magnitude • Ripple reduction observed when the drive frequency increases from 1 Hz to 100 Hz