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 …
[more]I continued tweaking my PN532 code and during the past few months I have added support for I2C interface, Mifare Classic tags (read-only), and Yubikey NEO keys (NFC Forum Type 4 interface).
I2C support means that you can use Adafruit PN532 Arduino Shield and normal Arduino UNO to run my …
[more]Recently, I have been playing with PN532 breakout board from Adafruit to read NFC tags and to communicate with NFC-enabled devices, like smart phones.
Adafruit's PN532 breakout board uses 3.3V voltage level and it is little tricky to use it with normal Arduino. So I ended up using Olimexino-328 …
[more]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 …
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