The Start


Hi, What and Why

Plug it in

Rule number 1

Water Sensor

Sound Sensor

Joystick

Tri Colour LED

RTC (Real Time Clock) DS1302

RTC (Real Time Clock) DS3231

Matrix LED step 1

LCD

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

Other things I have bought


Around this time, I started to run out of cables, and I wanted to stock up on some new items.
More resistors. These come in strips of 100 Resistors
Potentiometers. I chose 6 of varying values. Potentiometers
Strip cables. Male to Female, and Female to Female. Strip cables
I was running out of cable. cables
A nokia mobile phone screen looked interesting.
However, apart from the backlight coming on, none of the datasheets I found nor example sketches produced anything on the screen. I'll come back to it when I need it.
Nokia screen
Soldering iron. An essential piece of kit, I choose lead free solder to use. Soldering Iron
A few DC motors and a couple of L293D ICs.
The L293D seems a great chip, capable of driving a motor at varying speeds in both directions.
The motors had a 2mm shaft, I struggled to find any useful cogs to fit onto this.
DC motors
Battery holders and 50 AA batteries. Investigating how to optimise arduino power usage, I came across the sleep cpu functions. Batteries and holders
A power transformer and regulator, based on the LM317 chip. These are sold inexpensively as a complete kit with pcb board, making this an excellent way to hone soldering skills with a useful end product.

The output voltage is adjustable using the pot.

See here.
LM317 voltage regulator.
A 5V power supply. Chuck in a voltage (check the kit that you buy) and you get a steady 5V DC out. This is ideal to wire up to a 9V battery for a transportable arduino power supply - so any robot that you build will need something similar.
This is the kit based on the L7805 chip, see here.
LM317 voltage regulator.
A mixed bag of capacitors. These were ordered when I found a circuit for the infra red remote control.
Also 2 diodes !
Capacitors
Another mixed bag of a different type (electrolytic) of capacitors. Capacitors
1N4004 diodes. See wikipedia for the difference between the 1N4004 diode and others in it's range. Diodes
An ultra sonic distance detector. I want to make a robot that can prevent walking itself into chairs !

Photo next to a tealight candle for scale.
Ultra sonic distance sensor
A variety of transistors, to see how they work and what they do. Transistors