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Most of us have in the backpack a portable charger if your phone runs out of battery. these portable chargers have a USB connector so it can give you many applications to these sources of energy.

Step 1: Tools and Materials

Tools:

  • pair of pliers
  • soldering iron

Materials:

  • portable charger
  • soldering
  • LED
  • male USB cable
  • Tape

Step 2: USB Cable

Short rubber sheath that protects the USB port leaving only the metal part with electric cables. just let the power cables ( black and red) as shown in the picture.

Step 3: LED Connection

with the iron connects the USB port with LED in their respective polarities. I suggest placing a small resistance if you have any fear of accidentally melt the LED

Step 4: Sealed

Step 5: Connecting Portable Charger

As it is ready our little device you connect to the laptop charger and if all goes well the LED will illuminate and we have a USB flashlight for portable chargers

Step 6: Alternative Design

is the option of using two LEDs instead of one connected in series becoming more efficient system operation .

in the picture looks like this building dating

Step 7: Thanks and Enjoy!

I want to thank everyone for viewing my post .
Thank you very much and greetings from Chile :)

<p>nice, did you use a resistor? in series?</p>
Yes, in series. If you will use a resistor, you must use a small power resistor. For example 10k or 5k
<p>isnt that over kill i found a formula in forest mims engineering notebook to calculate resister value for leds rs=vcc-vled then divide by led i </p>
<p>muy bueno..</p>
Gracias :)
<p>Hey, very nice work!</p><p>I noticed in step 4 you bounced to Spanish for a bit! :) Some people share steps with text in both English and Spanish, which is a great idea if you wanted to do that.</p>

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