Tero's Arduino Blog

Some time ago I was spending evening with a friend and it came up that I had not ever written software I2C master routines, even though I have used I2C quite much in various projects.

So, to correct this omission, we armed ourselves with the I2C specification, sit down for …

I just pushed initial support for atmega32u4 and improved support for at90usb1286 MCUs to AVR-Ada repository. This means you can now use AVR-Ada with your teensy and Arduino Leonardo devices.

Teensy 2.0, Arduino Leonardo, and Arduino Micro devices have atmega32u4 processor and teensy++ 2.0 has at90usb1286 processor. These …

To optimize the power usage of my Arduino devices, I first needed to measure the power usage.

I could have done it traditionally with multimeter, but then I found Adafruit's INA219 sensor breakout board.

Adafruit also has nice tutorial for the sensor (which I actually bought from oomlout.co.uk …

Getting I2C working with attiny processors has been yet another long-time project of me. It has been stuck mostly because I haven't had time to create attiny4313 board with I2C chip on it.

But finally, I managed to create one:

The attiny2313 board, where I put all the stuff, comes …

My father had forgotten the BIOS password of his IBM Thinkpad T42 laptop and I promised to take a look at it.

It turns out that there is a relatively easy way to recover the password.

However, I didn't have parts described in the instructions, so instead I used Arduino …