My AVR Development Board

My AVR Development Board

I build a new dev board for my AVR and Arduino development. My old one really was too small... Since I am daily are working on the evaluation of all the nice and tiny IC's in my electronics box I needed this. Maybe it will become too small in some time but currently it helps me a lot.

It consists of two large breadboards and a wooden panel underneath with four rubber foots. I will work on optimizing this in the future and maybe I will write a document, describing how to build it like mine... ;)

Attiny13 Blink example

Image of Attiny13 MCUJust to keep and share the code... Here is the code for making a LED blink using an Attiny13 MCU from Atmel.

I got a package with about 30 AVR MCU's from different kind yesterday and now I will give them all a try. The next step with the Attiny13 is to build a thermometer with a RGB LED as indicator of the temperature. As temperature sensor I will use the LT1025 chip which I tried some days ago. I got many logic IC's too so it will be a hackish time this december. I will post the code and circuit here in some days when everything is working properly... ;)

#include <avr/io.h>
#include <util/delay.h>

#define LED_PIN PB4

int main(void) {

  // Configure LED_PIN (PB4) as output
  DDRB |= (1 << LED_PIN);

  while (1) {
    PORTB |= (1 << LED_PIN);
    PORTB &= ~(1 << LED_PIN);

  return 0;

Have fun... ;)

Evaluating LT1025

Today I found a chip named LT1025. It is a Thermocouple Cold Junction Compensator from Linear Technology which is very easy to use for building temperature sensors for measurement and control and can also be used to convert a heat gradient into electricity.

It took about 5 minutes to get it working in the Arduino environment.

Just order some samples from Linear, they will send you one or two without charge... ;)