2014-01-05 13.42.25

My dog as smart wireless DVR sensor

I live in a small village ~25km from Sofia, Bulgaria and commute daily to the city. My house’s alarm system would occasionally ring me and I would rush back home to see if all is fine, that can be pretty inconvenient. For that reason, I installed a basic home security CCTV surveillance DVR system, so…

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Keypad as USB keyboard

I fiddled with a new keypad today, this is not the first time I have a keypad project, but this time I want it to act as a USB keyboard instead. This is a convenient way to enter numeric data and I have some project ideas in the pipeline that will need a keypad. The…

DIKW

I am a @quantifiedself

I accidentally landed on a site called ‘quantified self’ last month and immediately realized I am doing lots of lifelogging myself. I track my commutes, log my weight, my body temperature when sick, my hot water usage habits, visitors to my home, coffee drinking. Power usage tracking  and habitat monitoring provide useful insights on my…

voltage_analysis

Home voltage analysis

I log the AC mains voltage at my house starting July 2013, you may recall my post where I was concerned about the unusually high voltage readings at home. Now that I have few months of data collected, it is time to do some analysis. I have 405835 measurements in total since then, taken every…

visits_world

Hello, world

I use Google Analytics on this blog to track visits and have collected statistics for couple years now. I toyed with these a bit today to see where are the visitors from, just out of curiosity and for no particular other reason. I used Tableau to generate the below stats, it connects to Google Analytics directly and has…

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The YAPM PCB is done

It has been a while since my last post, I have a new job and little time left for hobby stuff Anyway, I have put together the PCB for the Yet Another Power Monitor (YAPM) project and was able to do some preliminary tests over the weekend. To re-cap: the YAPM is a low cost Arduino…