Add links to assembly instructions

docs/assembly.rst

@@ -8,11 +8,12 @@ so that some simple soldering is required before using it.
 Basic Assembly
 ==============
 
-The simplest way to assemble the PewPew board is to use an Adafruit Feather
-board with female pin headers (Feather M0 Express works great for this), and
-to solder the male pin headers onto the PewPew FeatherWing. Afterwars, insert
-the LED Matrix into place, solder its pins from the bottom, and trim them with
-wire cutters.
+The simplest way to assemble the PewPew board is to use an `Adafruit Feather
+<https://www.adafruit.com/category/946>`_ board that supports CircuitPython (the
+`Feather M0 Express<https://www.adafruit.com/product/3403>`_ works great for
+this) with female pin headers, and to solder the male pin headers onto the
+PewPew FeatherWing. Afterwars, insert the LED Matrix into place, solder its
+pins from the bottom, and trim them with wire cutters.
 
 .. image:: images/pew-assembly.png
     :align: center
@@ -25,34 +26,38 @@ Note that you should solder the pin headers first, and then solder the LED
 matrix. Trying to do it in the opposite order may lead to damaging the matrix
 with your soldering iron.
 
+.. note:: The Adafruit Feather board is not included in the kit.
+
 
 Making it Flatter
 =================
 
 The basic assembly is fine, but it's good 2cm thick. You can make the whole
-thing much thinner by applying a number of tricks. First, use the narrow female
-pin headers for the Adafruit Feather. Second, move the plastic on your male pin
-headers to the end of the header, insert the header from the top, and try it
-with the Feather to see how long the pins need to be. Then solder them, and
-trim the parts sticking out from the top with wire cutters. This way the PewPew
-FeatherWing can sit right on top of the battery plug of the Feather.
+thing much thinner by applying a number of tricks. First, use the `short female
+pin headers<https://www.adafruit.com/product/2940>`_ for the Adafruit Feather.
+Second, move the plastic on your male pin headers to the end of the header,
+insert the header from the top, and try it with the Feather to see how long the
+pins need to be. Then solder them, and trim the parts sticking out from the top
+with wire cutters. This way the PewPew FeatherWing can sit right on top of the
+battery plug of the Feather.
 
-Note that the narrow headers are not included in the kit.
+.. note:: Note that the short female headers are not included in the kit.
 
 
 Optional Battery
 ================
 
-To make the PewPew even more portable, you can add a small LiPO battery (the
-100mAh batteries are about the right size). The FeatherWing even has a power
-switch built-in that you can use. Just solder the battery leads to the two
-holes marked "+" for the red wire, and "-" for the black wire. Be very careful
-to not short the battery wires while you are doing that. Then you can use
-two-sided tape to stick the battery on the underside of the FeatherWing,
-sandwiching it between the two boards. You may need to add some electric tape
-to prevent the metal body of the battery from shorting things on the boards.
+To make the PewPew even more portable, you can add a small LiPO battery (`the
+100mAh batteries<https://www.adafruit.com/product/1570>`_ are about the right
+size). The FeatherWing even has a power switch built-in that you can use. Just
+solder the battery leads to the two holes marked "+" for the red wire, and "-"
+for the black wire. Be very careful to not short the battery wires while you
+are doing that. Then you can use two-sided tape to stick the battery on the
+underside of the FeatherWing, sandwiching it between the two boards. You may
+need to add some electric tape to prevent the metal body of the battery from
+shorting things on the boards.
 
-Note that the battery is not included in the kit.
+.. note:: Note that the battery is not included in the kit.
 
 
 Software Setup
@@ -70,3 +75,6 @@ needed to use the PewPew hardware.
 In addition, you need to copy your program onto the board. You have to name it
 ``main.py`` for it to be started automatically on power-up. Later on we will
 see how we can use a menu program that will let you choose what to run.
+
+You can get all the files from the
+`project's repository <https://github.com/deshipu/pewpew>`_.