Here we use a ATTiny85 (can be ATTiny45, ATTiny44) to make an Arduino just for US3.00, so we name it as Tiny Arduino.

 

Tiny Arduino have only eight pins as shown in figure above, Pin4 is ground (Gnd), Pin8 is 5V (Vcc), Pin1 is Reset, Pin2 and Pin3 originally used to connecting the Crystal. In order to utilize all the IO, the internal oscillator (RC Oscillator) is used to replace the external clock which require a crystal. Therefore the Tiny Arduino is now come with five IO. Below shows the Arduino IO functions.

• There are five IO, each IO can be Input or Output
• Among the five IO, two of the IO can perform as PWM
• Among the five IO, three of the IO can perform as Analog Input

I2C may require to extend the features of Tiny Arduino.

 

 

• 1 x 5V power supply power supply
• 1 x Breadboard (Project board)
• 1 x ATtiny85 (This is our Tiny Arduino)
• 1 x Arduino Duemilanove (use to upload Sketch to ATTiny85)
• 1 x 10 uF capacitor  (prevent Arduino duemilanove from automatically reset)
• 5 x LED
• 5 x Resistors
• and some Wires

 

• Connect the Arduino Duemilanove to the computer
• Open the Arduino software , I'm using arduino-0023
• Select File> Examples> ArduinoISP from menu as shown in figure below

 

 

 

• Select Tools> Board> Arduino Duemilanove or Nano w/ATmega328 or Arduino UNO from menu

• Click on the Upload icon to begin upload Sketch to Arduino Duemilanove
• Now the Arduino Duemilanove is becoming an ISP

• Download ATtiny85 Plugin
• Identify the Arduino sketchbook folder, press File> Preferences from menu, figure below shows my sketchbook location in D:\ My Documents\Arduino

 

 

 

• Make a Hardware sub folder inside the sketchbook folder if it is not exist.
• Extract the downloaded ATtiny85 Plugin to the Hardware folder as shown in figure below

You will see Tools>Board>ATtiny85 (w / Arduino as ISP) from the menu upon completing of the above procedures.

 

 

Picture below shows the connection between Arduino Duemilanove and ATTiny85

 

 

 

 

 

 

 

• File>New from menu
• Copy the running light source code as below to your Arduino work space.
• Click on Tools>Board>ATtiny85 (w / Arduino as ISP) as shown in figure below

• Click the Upload icon to begin upload Sketch to ATtiny85

 

Source code for 5 channel running light, it occupied 804Byte of Flash Memory.

 

This is a more complicated Sketch, occupied 1508Byte of Flash Memory

 

Picture below shows my Tiny Arduino connecting to the Arduino ISP. My Arduino ISP is very simple too.