LiPo to MicroUSB adapter




In anticipation of my Raspberry Pi arriving I have created a LiPo (Lithium Polymer) to Micro USB adapter. This adapter converts the power from a 2s – 4s LiPo to a regular 5v. This is then outputted through a Micro USB to be plugged into a Raspberry Pi board. I will be using this to power the Pi when I use it as a ground station for my Arducopter (Which will be a whole new Instructable).
Unfortunately due to the frustration of my PCB etching attempts failing I forgot to take build photos. I only took a few once I was finished, hopefully it will be enough. I hope you all can figure out how it all fits together from the diagrams and photos. I have tried my best to explain what I did.
LiPo to MicroUSB adapter
Please let me know if there is anything confusing you.

Step 1: What you need

Parts that you need:

  • 1x veriboard/perfboard
  • 1x 7805 Voltage regulator
  • 2x 25v 10uf electrolytic capacitors
  • 1x Micro USB cable
  • 1x Deans Plug (Whatever Plug you use on your LiPo’s)
  • 1x Small cable tie

Tools:

  • Side clippers
  • Soldering Iron
  • Heat source to shrink the heat shrink (I used a hair dryer)
  • Solder
  • Hack saw to cut the board down to size

Step 2: Failed PCB’s and Schematic

LiPo to MicroUSB adapter Schemetic

My original plan was to print my own PCB and use that but after two failed attempts I gave up and simply build a simpler version on Veriboard. Once I was thoroughly frustrated from my one hundredth attempt at printing my own PCB failing, I drew up a schematic of a very simply Voltage regulator circuit. The capacitors are not strictly needed as this is not rectified AC but it doesn’t hurt to put them in.

 

For more detail: LiPo to MicroUSB adapter


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