ATmega8 Blinking LED and Interrupts

Several days ago I decided to clean up drawers in my desk at home and, of course, found several artifacts: old Univercity notes, Parker pen I was presented by my sister several years ago and some ATmega8A AVR microcontrollers. I had several vacation days and caught a cold. So I couldn’t help but installed Atmel Studio and CodeVisionAVR to play with LEDs a bit. ...

December 28, 2013 · 4 min · Serg K0SSK

RaspberryPi with Root Partition encryption, unlocked using a flash drive

Why unlock using flash drive: Because you don’t have keyboard or monitor connected to your RPi, do you? Information: I was using Pezz’s gist, which helped me a lot. Thank you very much, Pezz. Why Arch linux: because I wanted to try Arch, default kernels of Raspbian and Pidora lack(lacked? Maybe already have) needed encryption modules. SD card preparation Download Arch linux image from here: RPi downloads On your desktop check list of devices: $ ls -lah /dev | grep sd brw-rw---T 1 root disk 8, 0 Aug 11 15:43 sda brw-rw---T 1 root disk 8, 1 Aug 11 15:43 sda1 brw-rw---T 1 root disk 8, 2 Aug 11 15:43 sda2 brw-rw---T 1 root disk 8, 3 Aug 11 15:43 sda3 brw-rw---T 1 root disk 8, 4 Aug 11 15:43 sda4 Now insert SD card into card reader on desktop, and check list once again. You’ll see a new device we’ll write Arch linux image to. ...

December 20, 2013 · 5 min · Serg K0SSK