World smallest AVR board? + free eagle files

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1

Here is a little board that I have made. Included the eagle files, so you can do whatever you want with it. It's copyright free.

here is a code to flash a led for 3 second and power the mcu down, and with a push of a button, it powers on again, and flashes a led for 3 second again.

/*
D0-d4 
D2 mosfet output and LED
D0-D1, button input; D1-external interrupt

74-595 shifter
D2-LCK
D3-SCK
D4-sIn
*/

#include <avr/sleep.h>
#include <avr/interrupt.h>

int toggle=0;
int count=0;

  ISR(INT0_vect) {
  sleep_disable();
  count=0;
  }  
  
void setup() {
  pinMode(2, OUTPUT);
  
  pinMode (1, INPUT); //interrupt 
  digitalWrite(1, HIGH); 
}

void loop() {

digitalWrite(2, toggle);

delay(100);  
count++;
toggle=!toggle;
	
  
if(count>=30){
  digitalWrite(2, LOW);
  set_sleep_mode(SLEEP_MODE_PWR_DOWN); 
  
  GIMSK = 1<<INT0;	  
  sei(); 
  sleep_mode();     
}


}

tiny.zip (32.1 KB)

2

Hi there, this is a ATtiny85 board with voltage regulator I developed and sold on my webshop in 2011. 16x18 mm

Pin connections are made in a way you can simply plug it in a duemilanove / uno and code it with Arduino ISP sketch.

In 2011 was by far the smallest arduino compatible board ever developed. Was so fantastic I decided to keep 100 of them and safely store in my maker storage :slight_smile: (they are not for sale I use them for my experimentations with extreme happiness, personal product hehehe)

Here driving a robot kit Gioblu.com is for sale | HugeDomains

3

Thank you so much for sharing your project and files. :slight_smile: