Category Archives: Uncategorized

Connections

Ok, so I never got around to writing up the connections needed for Arduino Uno and my favourite 7 segment displays. I’ve had a few sets from this supplier and they’ve been a pleasure to deal with – very efficient, … Continue reading

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Another clock…

I came across these 2.3″ LED 7-segment digits the other week and just had to buy a set. I’ve been struggling to see the clock in our living room from where I sit and thought it would help if I … Continue reading

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Thoughts on battery testing

Batteries are handy things and these new-fangled 🙂 Li-ion ones seem to be fairly useful. I dismantled another unwanted netbook (aka “craptop”) power pack yesterday and acquired another 6 x 18650 cells. Some of these don’t seem to be up … Continue reading

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dummyLoad – first light…

Last day off for a while so I’ve mostly been “chilling” whilst the dummy load and a little bit of firmware did the hard work. The results I have are interesting but I need more data to draw any conclusions. … Continue reading

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Dummy load – final hardware steps…

Well I slept on the “dead bug” idea for the op amp I needed to complete my circuit. When I woke up this morning I really didn’t fancy doing that. Since arduino shields are stackable, I thought “Why not just … Continue reading

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More on the “Constant Current Dummy Load”

Not finished yet and there’s still software to cobble together when it is. I’ve had a bit of time today and made some progress with the LCD shield – well, it’s done which counts as “some progress” in my book. … Continue reading

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Li-ion Battery Capacity Testing

Well I’m just getting into the wonderful world of li-ion batteries – cheers Chris! The trouble is, I’m not sure where some of the older, recovered, laptop batteries I’ve acquired are at. Some of them really don’t seem to last … Continue reading

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