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The "Dead" Battery Lamp

scottiebabe over 1 year ago

Soft 404

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scottiebabe over 1 year ago in reply to beacon_dave +4

Excellent reference! Karen did a wonderful job on her joule-thief circuit . I thought about mentioning it, takes for mentioning Karen's project! These modules are beginner friendly and provide a regulated…
scottiebabe over 1 year ago in reply to Jan Cumps +3

Yes, past 600 mV there isn't much left... Of course you can use a fresh cell too Some of the low cost dollar store solar lamps use tabbed ni-mh cells, I'm sure if I were to shop around I could find them…
Jan Cumps over 1 year ago in reply to scottiebabe +2

you could, but for a very short time. By the time an alkaline battery has dropped to that voltage, there's virtually no joules left.

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scottiebabe over 1 year ago

Of course no one would ever consider lighting a candle when the powers out
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beacon_dave over 1 year ago in reply to scottiebabe

Only if you use it to power a LED lamp....

https://www.ecofan.co.uk/joi-lamp.html
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scottiebabe over 1 year ago in reply to beacon_dave

Tinkering away on one of those!

I have thought about trying one of these:

Biolite

A small solar panel is much cheaper, but doesn't work well indoors or at night...
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robogary over 1 year ago in reply to scottiebabe

I use this phone charger
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robogary over 1 year ago in reply to scottiebabe

I use this phone charger
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scottiebabe over 1 year ago in reply to robogary

Apparently flux capacitor chargers are real!
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