Category: Blog

Byte Insight

Sense Hat

The Sense Hat from Raspberry Pi was developed as part of the Astro Pi Project.  The Sense Hat comes with its own library and a variety of hardware including: a 8×8 RGB LED matrix for output; a five-button joystick for user control; and the following sensors:

  • Gyroscope used to measure the positioning of an object
  • Accelerometer used to measure the rate of the velocity of an object
  • Magnetometer that provides an electronic compass
  • Temperature
  • Barometric pressure
  • Humidity

The purpose of this page is a quick guide to using the different aspects of the Sense Hat but for full details you should check out the API.

Light Sensor

This circuit is based on the ARDX 09 circuit from Oomlout.  It shows how the Arduino can monitor light values using a Photo Resistor and adjust a LED in response. 

Arduino

The amazing versatile Arduino microprocessor board that can be used in many projects.

Python

Python is a highly readable language that is easy to use and learn hence it is gaining popularity as an education language.  However, this should not lead anyone to consider it a child’s language for it is not.  It is very powerful, flexible and platform independent.  It supports many styles of programming from scripting and web design to  GUI/Game development.

RoboCode

Robocode is a programming game, where the goal is to develop a robot battle tank to battle against other tanks in Java or .NET. The robot battles are running in real-time and on-screen.

MySql – Insert

Inserting rows into MySql can be done in a couple of ways. You can use the INSERT…VALUES and INSERT…SET commands.

MySql

MySql is the worlds second most popular database engine (July 2013) and its open source. It is based on SQL (Sequential Query Language).  Unlike MS Access it does not run as a stand-alone application.   It runs as a background service on a computer (typically called ‘a server’) and you connect to it using a username and password.  Once you have connected to the MySql server you can query it using SQL or Structured Query Language.  The server will respond with the results of your query.

MySql – Create Database

If you need to create a database via the command line (or through the MYSQL prompt in PHPMyAdmin) then you can use the following where dynamo is the name of the database you wish to create. See W3Schools/Create DB for more information.

CREATE DATABASE dynamo;

MySQL – Create Table

The process and command for creating a table in MySql are similar to that for a database. You will need to make decisions about data types and key fields. Detailed information on creating tables is available at W3Schools/Create Table.

Python – Strings

A string is a list of characters and, in Python, they are easy to declare using speech marks.

myquote = “Talk is cheap. Show me the code.”