How to Make a Cheap Attiny Arduino Board

Well most of time i get troubled when i need Arduino in some projects where i need few I/O pins
Well thanks to Arduino-Tiny platform
Arduino program can be burned into the Avr-tiny Series like Attiny 85/45

Arduino-Tiny is an open source set of ATtiny “cores” for the Arduino platform.

It provides a core that enables Arduino users to work with the ATtiny84 (84/44/24), ATtiny85 (85/45/25), and ATtiny2313 (4313) processors.


Advantages of Attiny series
Cheap cost hardly 1$
They can be used as stand alone in any circuit
Disadvantages of Attiny

Few I/O pins as compared to megaSeries

Less memory usually Attiny 25/45/85 have 2kb 4kb and 8kb respectively


But if u ask me Attiny are really useful for small projects
Even i think it is too cheap for a dummy to experiment on it.
So i made this small project that anyone can make their cheapest tiny arduino at home

Also like my page for support

Step 1: Parts

Things that you will need

  1. Veroboard -0.3$
  2. 8 pin IC Socket -0.10$
  3. Wires single core 22 gauge- 0.10$
  4. Attiny 85- 1.35$
  5. Male header-0.16$
  6. Female header-0.16$

So Total cost is 2.17$

Step 2: Circuit Diagram

Almost all chips are programed By Using 6 pins

  • MISO(Master In Slave Out)
  • MOSI(Master OUt Slave In)
  • SCK(Slave Clock)
  • Vcc
  • Gnd


Connecting With Arduino

Pin13 will be connected to SCK

Pin12 will be connected to MISO

Pin11 will be connected to MOSI

Pin10 will be connected to RESET

Next part will Cover how to use the arduino as ISP to Program the attiny85

Step 3: Using Arduino As ISP

Setting Up the Firmware

You need to download this file for programing the attiny

after you install it

  • Open Arduino.exe
  • File > Examples >ArduinoISP
  • Upload Sketch to your Board
  • On the Arduino Uno, you’ll need to connect a 10 uF capacitor between reset and ground (after uploading the ArduinoISP sketch)
  • Connect The Arduino Pins To the Arduino Tiny Board
  • Goto Tools >Boards>Attiny 85 8 MHz
  • Goto Tools>Programmer>Arduino as ISP
  • Burn Bootloader

CONGO attiny is Ready To be Programmed By arduino

Lets Us see a simple Program “Blink ” in action

Again going to

File > Examples >Blink

Change The pin no. from 13 to any one of the pin out of Attiny85


Upload it

Step 4: Blinky in Action

The Blink Program In action

Enjoy Your Board

It can be Also Run on A external Power source You just need a regulated Power supply of 5

You can also Use a Serial Programmer to Burn the Bootloader and sketche

If You have any queries Feel free to ask me

Source: How to Make a Cheap Attiny Arduino Board

This Post / Project can also be found using search terms:

  • attiny85 tynosaur

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