Introduction: How to Make a Cheap Attiny Arduino Board

Picture of 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

Picture of 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

Picture of 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

Picture of 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

Picture of 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


KunalK25 (author)2016-04-25

hey buddy nice tutorial. Can you please tell me if we can use this ATtiny for serial communication via HC05 module. I mean if we can use its two pins as Rx Tx pins.


The Answer Guy (author)2015-11-21

Hey you can get cheap arduino nano for about 4$ on eBay and aliexpress. Just two times the cost of this but infinitely more useful.

DmitryP2 (author)2015-11-16

What about stm32f0 ? it,s 2x cheaper, 4x faster, has dma transfer ?

SalmanF4 (author)2015-10-14

why 10uf capacitor is used?

Where the capacitor is connected?

AT (author)2015-04-16

Nice little solution. I spent a little more money and dedicated a proto shield for pushing code to my ATTiny85. I am going to get some 84s and set up the proto shield to accept either chip.

geekrex (author)AT2015-07-04

thats cool would like to see it

AT (author)geekrex2015-08-26

I will take a picture of that the next time I get that out. :)

AmitM12 (author)2015-07-13

Awsome Man ..

geekrex (author)AmitM122015-07-13

thank u

andsen942 (author)2015-04-25

What if I used a atmega328 with a 28pin socket instead? How would I have to do this differently?

geekrex (author)andsen9422015-07-04

andsen u have to modify the board u will need a crystal oscillator for atmega328

KingsleyF (author)2015-04-19

Don't seems to work in Arduino IDE 1.6.3. Any solution?

Rouxlet (author)KingsleyF2015-04-29


Tested on Arduino IDE 1.6.1 + ATtiny85, works !!

geekrex (author)KingsleyF2015-04-19

Use lower version ,the core is not updated for 1.6

martin.pfitzner.942 (author)2015-04-15

Im Sorry, but i still don't understand your Step 2 in the way its shown on the schreenshot. The pins of the IC seem to be connected to nothing. Is your circut ment to function like beeing on breadboard so all pins in a row are meant to be automatically connected?

Ya its like we connect on breadboard plz see the schematics given in comment below .
if still unable to understand i am here :)

NajiK1 (author)2015-04-12

can I use 100uf capacitor instead of 10uf ?

geekrex (author)NajiK12015-04-13

No you have to use 10uf as specified by arduino

NajiK1 (author)geekrex2015-04-14

Thanks :)

Hapis (author)2015-04-07

I dont have arduino uno, can i use usb to ttl to program the chip?

JRV31 (author)Hapis2015-04-09

this is a good programmer for an ATtiny if you don't have an Arduino:

Instruction for set-up and use are here:

geekrex (author)Hapis2015-04-07

No u need to have ICSP programmer
U can buy a usb to icsp programmer

dinodroppings (author)2015-04-07

Brilliant work, I have added proper printer friendly PDF file more on ATTINY85

geekrex (author)dinodroppings2015-04-07

Thank You

dinodroppings (author)geekrex2015-04-08

Hey add this PDF to your instructable, people are confused from the fritzing diagram.

geekrex (author)dinodroppings2015-04-08

I already added a schematics

geekrex (author)dinodroppings2015-04-08


dglick (author)2015-04-07

I don't understand the circuit diagram. It doesn't look like the 8-pin socket is connected to anything at all.

geekrex (author)dglick2015-04-07

See the schematics for reference

colin37 (author)2015-04-07

I do not understand your circuit diagram in step 2. The various pins of the IC seem to be connected to nothing if you are using a board as the one shown on the photo. Can you show us the other side of your board so we can see the connections between IC pins and other components?

geekrex (author)colin372015-04-07

i have given a schematics plz go through it i think ur problem would be solved

geekrex (author)2015-04-07

I think this should help

Phoenix78 (author)2015-04-07

I'm a little known with arduino but unknown with avr.

So I have a few questions.

1. What is avr?

2.What is a Bootloader exactly? (Arduino = avr + Bootloader) ???

3.Can you use the Arduino ICSP-header to write the Attiny?

NIce instructable with example.


JRV31 (author)Phoenix782015-04-07

1 - AVR is the series of microcontrollers made by Atmel.

2 - On an Attiny85 the "Burn Bootloader" option does not actually burn a boot loader. It only sets the fuse bits to the right frequency.

3 - No

jmrobinson (author)2015-04-07


Muhammad Tanvir (author)2015-04-07

Graet Idea.

verlwb (author)2015-04-07


geekrex (author)verlwb2015-04-07

Thank You

stannickel (author)2015-04-07

Wonderful idea! Gotta try it!

geekrex (author)stannickel2015-04-07

Sure Try it

geekrex (author)2015-04-03

we are using arduino language to simplify the programming. you can also program with avr c with a serial programmer . For that you don't need to burn the boot loader

discostu956 (author)geekrex2015-04-03

I'm pretty new to all this. does that mean that to use the arduino language you have to program it with an arduino, or can you still use another isp and use the arduino language?

geekrex (author)discostu9562015-04-04

ya u can use arduino isp then program it with any other language

discostu956 (author)geekrex2015-04-04


geekrex (author)discostu9562015-04-04

I hope u make ur own board and upload its pic
i would love to see it

discostu956 (author)2015-04-03

That's great, thanks! Does it have to be programmed with arduino or can you do it with an avr isp?

geekrex (author)discostu9562015-04-04

you can program in arduino or avr c
but writing codes in arduino is way simpler than avr c

MAYER MAKES (author)discostu9562015-04-03

The arduino acts as ISP programmer for the Attiny.

you can use any ISP programmer that can program Atmel MCUs

A similar contruction is used to programm the Arduino pro mini

geekrex (author)MAYER MAKES2015-04-03

The pro mini works on mega series chip which are a little costly but ya i would like you to make ur own arduino

discostu956 (author)geekrex2015-04-03

Thanks guys. Sounds good, will give it a whirl

About This Instructable




Bio: So basically i am a crazy person, who loves to think the most odd way ever possible,who makes what he thinks and also let ... More »
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