The Start

Hi, What and Why

Plug it in

Rule number 1

Water Sensor

Sound Sensor


Tri Colour LED

RTC (Real Time Clock) DS1302

RTC (Real Time Clock) DS3231

Matrix LED step 1


Stepper Motor

LCD revisited with PCF8574T

Humidity Sensor

Shift Register

RFID tags (RC-522)

7 Segment display

Ultrasonic distance sensor

5V regulator

analogRead and analogWrite

Wiring an Array of Switches

The next step

Other things I have bought

Infra red and Processing

Programming a separate arduino chip

Creating your own PCB

L293D for a DC motor

4 digit 7 segment display

Starting with motors

RF433 Wireless Comms

Sort a character array

More stuff

I2C devices (SDA,SCL)

I2C scanner

SPI devices (MOSI,MISO)

HMC5883L Compass

MMA7361 Accelerometer

Added projects

Message Display System

4WD robot car
4WD robot car II

4WD robot car COMPLETE

MP3 Player

Rule Number 1

Always connect a resistor !

By convention, a red cable plugs into 5V and a black cable plugs into GND (ground).

An LED must be plugged in the correct way round; the long leg is for 5V, the short leg is for GND. If you get it wrong, there's a small popping sound and a melting electronics smell. When this happens, whip out the power supply quickly, then replace the LED with a new one.

You must plug in a resistor. If you don't, there's a circuit from 5V to GND, and something bad happens.

A simple circuit; 5V to a resistor; resistor to an LED; LED to ground. connect a resistor