Category Archives: engineering

Weather

I’ve been playing around with a homebrew weather station again, I dusted off the code I’d had running on a spare Raspberry Pi and added a few features to it. It’s now logging temperature, humidity and air pressure. I plan to add some more external sensors as soon as the parts arrive from eBay.

The graphs below are live data (for as long as I keep the station running)



The code will be on github shortly.

Playing Radio

Last weekend a bunch of us from the Havering Amateur Radio Club decamped to a field at the Kelvedon Hatch secret nuclear bunker and set about trying to contact as much of the planet as possible by radio.

It was a good excuse to try out my new radio, an Icom 9100, and break out the big beams and linear amplifiers.
IMG_20130721_130327

We had two HF stations, on 20m and 17m and one VHF station trying to work though some satellites.
A total of over 300 QSOs were logged, a good third of those using CW on 20m. There is a QSO map on line. Some photos of the event are on Flickr.

You’ve got to photograph a bug or two when you’re in a field. Here’s a ladybird larvae.
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