itbrainpower.net
THE ALPHABET PROJECT - professional Arduino & Raspberry PI shields

RASPBERRY PI FREE STYLE POWERING (RPI SWITCHING POWER SUPPLY HACK)

 

About this tutorial

This tutorial enables you to power your Raspberry PI3 / II / B+ / ZERO from any power sources that supplies voltage between 6.5V up to 20V and current >1A.

RASPBERRY PI FREE STYLE POWERING(RPI SWITCHING POWER SUPPLY HACK)

 

For this how to I used as power source the 19V wall power adapter from one old BENQ notebook.

This hack is useful also in configuration where gel-Lead(Pb) rechargeable batteries are used as power supply.

 

Time needed: between 15 to 30 minutes

 

Skills required: soldering.

 

Gathering parts and tools

RASPBERRY PI POWER SUPPLY HACK - WHAT YOU NEED

 

Parts:

  • 1pcs. x g-SPS 5V version switching power supply
  • 1pcs. x 2.1mm/2.5mm barrel power jack (choose one that fits with your wall adapter) or see "Barrel jack alternative" and g-SPS reference later
  • 1pcs. x 3 pins standard 0.1"/2.54mm row-header 90 degrees or straight
  • connecting wires x2
  • optional 1000uF/6.3V electrolytic capacitor, low ESR (optional, useful in case of high current consumption pulses)

 

References:

 

Tools:

  • soldering iron
  • small pliers / clip

 

Soldering the connectors

RPI SWITCHING POWER SUPPLY CONNECTOR SOLDERED

RPI SWITCHING POWER SUPPLY CONNECTING PADS DETAILS

Remove the central pin from the pin-header using the pliers or the clip.

Solder the pin-header (see the two pictures above).

Solder the barrel connector (optional, see "Barrel jack alternative" later).

Check for short-circuits!

 

Wire the boards together

Raspberry PI SWITCHING POWER SUPPLY WIRED

Connect the wires as shown in the header picture. Double check the polarity!

You are ready. Enjoy!

 

DO NOT REVERSE THE POLARITY! DO NOT MAKE SHORT CIRCUITS!

 

HINTS:

  • Increase the stability for bigger current loads - you may use one 1000uF/6.3V lowESR electrolytic capacitor. Bend the capacitor terminals to 90degree, insert it(from the top side)) to the "+" and "GND" [placed just above the "+" hole marking] vias/holes and solder it. (reference: "g-SPS v1.02 5V output - power supply for Raspberry PI" picture above)
  • Barrel jack alternative: you can use 2pin standard 0.1"(2.54 mm) soldered to the +Vext and GND pads, as input power source connector. See details on g-SPS reference bellow.

 

WARNING:
THIS POWERING CONFIGURATION BYPASS THE RPI BUILT IN POWERING PROTECTION!

TUTORIAL PROVIDED WITHOUT ANY WARRANTY!!! USE IT AT YOUR OWN RISK!!!!

More elegant hardware solution here implements this whitout using wires.

 

 

Originally published by Dragos Iosub on: instructables.com.

 

 

 

 

document version 1.02 / 2016-09-28 © R&D Software Solutions srl