Author Archives: majek

Writing to internal FLASH on Arduino

History In LCD88 I use internal flash as storage for model definitions. Of course, these should be editable without reflashing all firmware:-) On AVR chips writing to flash is only possible from bootloader section, so I needed such feature in … Continue reading

dm-cache in Slackware

bcache vs. dm-cache I tested bcache about year ago on my spare/backup server and it worked quite fine. But since then every newer kernel had new issues, even on mailing list there were suggestions that bcache should be marked back … Continue reading

Christmas tree lamps with Arduino and WS2811 leds :-)

Somewhere at the beginning of November I discovered RGB LEDs with embedded controller: WS2812 and others. Idea was so cool for me that I had to own one to play with it 🙂 These chips became so common, that there … Continue reading

Initrd in Slackware

There is small simple howto with Slackware package mkinitrd, man page says a little bit more, more is kind of mystery 🙂 I switched from full kernel (in fact, my own compiled kernel) to initrd few years ago and since … Continue reading

Picture thief

Recently I noticed in server’s logs that one of my blog pictures become very popular: It’s from this post: RTL2832U spectrum analyzer – part 2 Sometimes people embed my schematic or pictures on forums to enhance discussion. But this time … Continue reading