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Re: Nicro Day-Night 2000 solar vent repair
Hi again, thanks for useful info. I realise I typed 300 mAh, it should have been 3000. You are right about the mathematics, and maybe all those mA are not going into charging, depending on the motor. In my case the original motor seems OK and it works now. I saw a question in one of the posts about the little electronic components, and in the cheaper vent I used (to cannibalize to be able to retain my old NICRO with deck plates), I found two little things that read IN58!9MIC, which when checking on Google translates into 1 Amp Schottky Barrier Rectifiers, which I take is a great kind of diodes. In my case the solar panel gave about two volts (2.05 or so) and the diodes (connected in parallel between the panel's positive and the battery positive / motor positive) took off something like 0.15 or 0.2 volts i.e. the voltage on the user side was 1.8 volts. That is pretty much for the 1.2 volt battery but if it really turns out to be destroyed I can replace it yearly. Or simply remove it, after all the earlier setup did not even have a day and night function.
Regarding the quality of the cheaper ones, yes I agree; as I removed the panel etc of the cheaper one, the electrical wire connections came off by themselves, and the motor - probably essentially the same as the hobby one - was much harder to get to move with the panel, so I think the older one is still of better quality. I am curious, though, at the rating of the motor from Sundance, as it says 1.5 - 12 V and thus should not really have reacted to 3 V as overvoltage. I would be interested in trying the 0.5 - 3 V although it is small and weak, it takes 100 mA to start but runs without load on 50, on rather high revs. That is, if the data sheets are right. I do not know what the load is from those masses of cubic feet of air that is transported. Well well, apart from being an interesting experiment it might save a buck, when we do not have to patronize those expensive Marine Equipment Shops. Until next repair that is.
Hope to get to sail soon too... Rain here, hesitate to go out and get wet.