Intro A while ago I set out to build a solar lamp that can work all the time, especially in the dark winter months. Using real solar production data and a simple excel model, I was able to figure out combinations of battery and solar cells that would be able to power the LED in a SOLVINDEN lamp through the dark winter months. But in my laziness, i never ended up building it. Until I… Continue reading
Intro I have used 2 types of LED torches: regulated and unregulated. The unregulated ones are the most common and they use some simple circuits for the LEDs, which means that as the battery discharges the light output gets lower. The regulated ones use some circuit to maintain a constant current flow as the battery discharges, for as much as possible. What about the Energizer hard case pro pivot plus? This is an odd one.… Continue reading
Intro A while ago I have evaluated the powering options for my smart home sensor nodes. One thing was really clear: I would try to avoid small batteries and using anything else besides the common AA(A) sizes. This makes nodes last a long time on a battery that is easy and cheap to find. And I was right about this – the plethora of commercial remotes and sensors that I also used (like the ikea ones)… Continue reading