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/*
  7.40 - Grove - Project 1: Control the LED blink rate with a potentiometer
  
  Control how fast an LED blinks with a potentiometer.

  Simply turn the pot one way to speed up blinking, and the other way to
  slow it.
  
  
  Components

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/*  06.21 - Grove - 0.54 inch Red Quad Alphanumeric Display position demo
 *   
   This sketch demonstrates how to use the Grove - 0.54 inch Red Quad Alphanumeric Display.

   It will print letters and numbers at specific positions, and also control the
   blink rate and dots.

   
   Components
   ----------

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/*  06.20 - Grove - 0.54 inch Red Quad Alphanumeric Display demo
 *   
   This sketch demonstrates how to use the Grove - 0.54 inch Red Quad Alphanumeric Display.

   It will print letters and numbers.

   
   Components
   ----------
    

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/*  06.12 - Grove LCD RGB Backlight module, custom characters
 *   
   This sketch demonstrates how to use the Grove LCD RGB Backlight module.

   Specifically, it shows how to create and display custom characters.

   To create a custom character, you must draw it using pixels. Each character
   is drawn on a 8x5 pixel array (8 rows, 5 columns).

   For example, a smily emoji would looks like this ("x" is an "off" pixel, 

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/*  06.10 - Grove LCD RGB Backlight module Hello World
 *   
   This sketch demonstrates how to use the Grove LCD RGB Backlight module.

   It will print a welcome message and start a counter, with a red backlight.

   
   Components
   ----------
    

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/*  05.60 - Grove servo motors
 *   
   This sketch demonstrates how to use the Grove servo motor.

   For the servo motor to
   work, you must connect it to a PWM-capable pin. 
   
   Grove sockets that breakout PWM pins are D3, D5, D6, and D8 (inner pin only).

   Connect the servo motor to Grove socket D3 and upload the sketch.

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/*  05.50 - Grove Relay module
 *   
   This sketch demonstrates how to use the Grove relay module.

   This sketch is identical to the one from 05.10, that we used with the
   LED kit module. We'll use a digital pin to energise the relay coil, and
   drive a large electrical load.

   The load can be anything the draws less than 10A current and 30V.

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/*  05.040 - Grove buzzer module

   This sketch demonstrates how to use the Grove buzzer module to make noise.

   This sketch is supported by a second file that contains definitions of tone names
   and their frequencies. We use these tones to play some music.


   Components
   ----------

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/*  05.010 - Grove LED module
 *   
   This sketch demonstrates how to use the Grove LED kit.

   This module contains a header in which you can attach an LED. Take care
   to connect the anode (long pin) of the LED into the socket marked with "+".
   The cathode should go to the socket marked with "-".

   You can use a Phillips screwdriver to adjust the brightens by turning the 
   on-board potentiometer.

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/*  04.030 - Grove sound sensor
 *   
   This sketch demonstrates how to use the Grove sound sensor.

   The sound sensor  is an analog device. It outputs a voltage 
   level that depends on the intensity of the sound it captures. 
   This sketch calculates the volume of the sound based on the
   last 32 samples it captures.

   Upload this sketch and start the Serial monitor (you can also use