Step 1: Components Needed
Step 2: Supercapacitor Polarity
Step 3: Soldering
Then solder the negative pin of the supercapacitor to the 4th (0V) pin of the USB male connector.
Now, try to connect the positive pin of the supercapacitor to the 1st pin (5V). For the connection I am using a resistor leg.
Step 4: Soldering
Finally, connect a 1K resistor from the negative pin of White LED to the 4th pin (0V) of the USB male connector.
Step 5: Schematic
Step 6: Testing
You should see the White LED turned on (if it doesn’t turned on, there are some mistake in the connection), then after 10-30 second, you can unplug it and you should have around 10 minutes of the LED light.