4 ms·
Apparently solar cells larger than a calculator one can give about 30mA, 5V at peak power output [1]. We really need to know surface area and lumen to know how
by bArray 9y ago
Apparently solar cells larger than a calculator one can give about 30mA, 5V at peak power output [1]. We really need to know surface area and lumen to know how good this thing performs.
[1] https://www.amazon.com/53X30mm-Micro-Power-Solar-Panels/dp/B01BFX65YK/ https://www.amazon.com/53X30mm-Micro-Power-Solar-Panels/dp/B...
- wlesieutre 9y agoUnits point of interest, the luminous flux per area is called "illuminance" and measured in lux (lumens per square meter) or footcandles (lumens per square foot)
- roesel 9y ago`footcandle` is a ridiculous name for a unit.
- ouid 9y agoit's not even the right dimension.
- contingencies 9y agoCatchy though. Same style: Toebright?[0] Fingerbling? Nosefire? This sort of fundamentally physical compound noun has a sort of medieval ring to it. [0] In homage to Madeleine
- wlesieutre 9y agoOriginally comes from 1 fc being the illuminance on a surface 1 foot away from a 1 candela light source. A candela being roughly the intensity of light from a candle. Intensity (candelas) breaking down to lumens per steradian. They're a measure of how bright a light is in a particular direction, rather than its total light output (which is lumens). And steradians, for the unfamiliar, being a measure of "solid angle". Steradians are to 3D angles as radians are to 2D angles. A 1 steradian solid angle projects out to an area of 1 unit^2 on the surface of a unit sphere. Fun stuff!
- wlesieutre 9y agoOther fun fact, 1 fc = 10.7639 lux, because that's how many square feet make up a square meter. But in the lighting industry we just pretend 1 fc = 1 lux for most conversions, because eh, close enough.