Kit assembly

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Zerophone Assembly Guide (Delta revision)


There are a few documents you can use to help you assemble your ZeroPhone:

If you get stuck or are unsure about something, feel free to ask for help on IRC (details on the wiki's frontpage).


The assembly is split into two major parts:

FIXME: add pictures of typical SMD and through-hole components

You have to start by the SMDs since they are the smaller and trickiest parts and might not be accessible once the trhough-holes components are soldered. Your best friend is the interactive BOM, followed by the SMD assembly page (tips, details on marking, ...). We might be able to send you a board with the smallest and trickiest SMDs already soldered if you contact us :-)


The keypad is a good start if you doubt your soldering skills: it's easy to solder and hard to mess up.

Suggested color-coding for the keypad

  • Delta keypad down.jpg
  • Delta keypad up.jpg
  • Soldered delta keypad up.jpg
  • Soldered keypad back delta.JPG


Soldering orders:

  • Side buttons
  • Front buttons
  • Headers

Tip: In case you purchased side buttons without plastic pins that go into the PCB holes, you might want to superglue the buttons to the board before soldering them so they don't slip while soldering, as well as don't tear off as easily. You should then be careful while soldering, though, make sure to not let the fumes near your face.

Front board

-You might want to start soldering with the front board, it has TPA2005 (0.65mm pitch) and AtMega (0.8mm pitch) chips, it will give you the most challenge during soldering. Using solder wick will be helpful here.

Back board

This is the most component-heavy board of the ZeroPhone. Check that everything is in order before you solder the Raspberry Pi Zero, since some components won't be reachable after that.


Soldering order:

  • SMDs
  • Headers
  • Charging port
  • GSM module
 * Add spacers between the GSM modem and the GSM pin plastic.
  • 5v step-up
  • USB port
  • USB wires
  • Raspberry Pi Zero

Upper/Front side

FIXME add pictures, details and tips

Lower/Back side

FIXME add pictures, details and tips


The first set of jumper depend on the model of display you use:

  • Heltec displays
  • Solder jumper configuration for Heltec displays

Warning: make sure you have the VCC and GND pins wired correctly! Wiring them incorrectly will destroy the display the instant you power the phone on.