22 March 2015

Sun illumination logger with Arduino - summing it up

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The 2015/03/20 Solar eclipse is gone and it is time to summarize my short project about it. It all started one day at work during lunch br...
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13 March 2015

Sun illumination logger with Arduino - 4 days worth of data

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My photovoltaic data collection is still producing data. This is the comparison of four days: Yesterday the sky was not 100% clear, so ...
10 March 2015

Sun illumination logger with Arduino - take #2

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F ollowing my previous post I revised my circuit to measure the short-circuit current generated by my small panel. I will not take twin meas...
06 March 2015

Sun illumination logger with Arduino - first data

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I let the Sun illumination logger run for one day. It was a success, since it worked notwithstanding the wind that could have carried away t...
04 March 2015

Sun illumination logger with Arduino - eclipse oriented

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L ast week I found out that a good part of Europe will see a Solar eclipse during the morning of March 20th, 2015 . In my location the Sun ...
06 February 2015

Cheap assorted resistors kits: a *real* bargain?

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Not long ago I bought a pack of assorted resistors: 56 values at 1% 1/4W, 20 pieces each. The item name was something like "1120Pz 1/4W...
04 February 2015

BITX - first changes for my yet-to-be-built v3

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Since the BITX v3 PCB arrived earlier than expected, I was not ready to build it. I dug out a decade old bag of components containing 10 MHz...
03 February 2015

BITX - first steps, jumpers

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The first step in building a BITX v3 (on PCB) is to install jumpers. You can see that I got better in the process of cutting to proper lengt...