doc(tutorial): add required hardware chapter

docs/tutorial/README.md

@@ -5,7 +5,8 @@ title: Tutorials
 Tutorials
 =========
 
-* [Installing and Running XOD](./install/)
+* [Installing and running XOD](./install/)
+* [Required hardware](./required-hardware/)
 
 1. [Hello](./01-hello)
 2. [Upload to Arduino](./02-deploy)
@@ -28,7 +29,7 @@ Tutorials
 19. [If-else branching](./19-if-else)
 20. [Smoother changes](./20-fade)
 
-* [Complex Projects?](./complex-projects/)
+* [Complex projects?](./complex-projects/)
 
 ### Contributed tutorials
 

docs/tutorial/install/README.md

@@ -32,9 +32,10 @@ Windows, macOS, and Linux. Find a distribution package for your system on
 What’s next
 -----------
 
-Once you start XOD IDE, you’ll see the `welcome-to-xod` project open. It’s
-a tutorial project split on many small lessons. Follow instuctions in its
-comments to learn XOD.
+Once you start XOD IDE, you’ll see the `welcome-to-xod` project open. It’s a
+tutorial project split on many small lessons. Follow instuctions in its
+comments to learn XOD. There is a [web version of the tutorial](../01-hello/)
+if you just want to get shallow understanding.
 
-There is a [web version of the tutorial](../01-hello/) if you just want to get
-shallow understanding.
+You’ll need some hardware components to compete the tutorial, here is the
+[list of parts](../required-hardware/).

docs/tutorial/required-hardware/README.md

@@ -0,0 +1,34 @@
+---
+title: Required Hardware
+---
+
+# Required Hardware
+
+XOD is not tied to a particular vendor of hardware. It is compatible with
+various controller boards, sensors, and peripherals devices that can be
+programmed with Arduino IDE.
+
+Nevertheless, for the best experience with this tutorial we recommend you
+using [SparkFun Inventor Kit](https://www.sparkfun.com/products/14189?utm_source=xodio&utm_medium=xod&utm_campaign=tutorial)
+because it contains all the components you’ll need to complete the lessons.
+
+[![SIK](./sik.jpg)](https://www.sparkfun.com/products/14189?utm_source=xodio&utm_medium=xod&utm_campaign=tutorial)
+
+## Components you’ll need
+
+* 1× Arduino (or compatible) board
+* 1× USB cable
+* 1× Breadboard
+* 2× LED
+* 1× TMP36 temperature sensor
+* 1× Servo
+* 2× Tactile buttons
+* 1× Photoresistor (aka LDR)
+* 1× Potentiometer
+* 2× 220 or 330Ω resistors
+* 3× 10kΩ resistors
+* Jumper wires
+
+## Ready?
+
+Go to the [first lesson →](../01-hello)