Electronics > Projects, Designs, and Technical Stuff
Solar Powered Low Power Embedded Device
bdunham7:
That datasheet shows a lot more current for that part number than what you are saying.
Kalcifer:
--- Quote from: bdunham7 on July 02, 2020, 06:01:30 pm ---That datasheet shows a lot more current for that part number than what you are saying.
--- End quote ---
As you can see here, the power and current values that you are noting for the AM-5904 are for outdoor use with a lux of 50k. But if you look at this, you see that for indoor (or low light) use with a lux of ~10, the current drops to what I expect.
bdunham7:
OK, I didn't glean that you were using this indoors at such a low light level. 10 lux is pretty dim. However, the part number you gave is not one of the indoor models. You might want to do some actual testing because I think your results might be significantly different than you expect.
Kalcifer:
--- Quote from: bdunham7 on July 02, 2020, 08:07:21 pm ---OK, I didn't glean that you were using this indoors at such a low light level. 10 lux is pretty dim. However, the part number you gave is not one of the indoor models. You might want to do some actual testing because I think your results might be significantly different than you expect.
--- End quote ---
I am not using it indoors; however, the light levels that I will be expecting will be similar to that of an indoor device. This device will permanently be in some form of shade. I can do my best to orient the panel to get more light, but generally it will be in a shady area.
bdunham7:
An experiment is certainly in order, as we're all guessing, but my guess is you will have a lot more current than you think with that panell. Are you using more than one cell in series? How many? I suspect that the simplest solution is also going to be the best, and that is just your panel, up to 3 cells of at least 600mAh and a 1N4148 blocking diode. If you don't have parts yet, a cheap experiment could be done with parts from those solar pathway lights the sell at the dollar store.
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