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

Plug it in

You can plug it in to your computer USB port immediately, without a problem. A USB port gives 5V of power.

If its working correctly, then the green led comes on, indicating power is supplied, and an orange led flashes, indicating it's resetting itself, then stays on.

5V is enough for (and is the standard for most) electronic components; equivalent to 3 'AAA' batteries, so enough to power a torch battery, not enough to hurt you if you touch it, and also not enough to power a motor.
The connections around the edges are for plugging stuff in.

After plugging the arduino into your computer via the USB cable, you can run the Arduino IDE program on your computer. (IDE = Integrated Development Environment).
The IDE will bring up a window; you type in computer code (a 'sketch') and upload it to the arduino. The arduino will then run that code.

I use Linux Mint 16, and the arduino IDE was available in the software repositories for easy installation.

Caution !

After a few days of tinkering, I searched online for code to use my humidity sensor. It melted.
For your first few experiments, you may want to consider using code only from the official website,

This is my arduino plugged in to my USB port. Note that I have 2 orange LEDs because I am running a sketch. Initial plug in should give you 1 orange LED and 1 green LED. Plug it in

The best way to read it ! Get a hobby magnifying glass. I chose a hobby tool that also has 2 flexible clips, to hold pieces together while soldering.

There's no shame in using a magnifying glass ! You will need to read the arduino board, and resistor codes, and the numbers on many components. Magnifying glass