maxomill Posted June 1, 2018 Share Posted June 1, 2018 my new pet project I have a back up light that some of you are probably familiar with . its the magneto light that is sold all over the place esp at verimark and builders for R199 . it looks like a brick and has 24 leds on the front . it has 2 settings low and high . works super and I think its the best value for money light on the market . if plugged in it will even come on when the power fails and it also has a usb for charging your cell phone . now the new ones have a charging port for a solar panel . a 9v input to charge it with . my issue is where can I find a pv panel that I can use as it has a 4ah 6v battery . (12v solar panels can run up to 18v)(yes I could put a small 12v solar panel on it will pull down the voltage but would need overcharge protection for long term) I could buy a 6 v solar regulator (cant find any local) off some site but was wondering if any one has a cheap and easy or nasty better idea bottom line I probably need a 20 w solar panel to get a full solar charge in a day awaiting any suggestions cheers max Quote Link to comment Share on other sites More sharing options...
PJJ Posted June 1, 2018 Share Posted June 1, 2018 a cheap PWM 5-10A charger would probably be your best/cheapest bet Quote Link to comment Share on other sites More sharing options...
___ Posted June 1, 2018 Share Posted June 1, 2018 9 hours ago, maxomill said: magneto light that is sold all over the place esp at verimark and builders for R199 The charging circuits in those things are horrible. Cheapest possible way to get it done, basically kills the battery in about 6 months if you leave it plugged in permanently. I briefly considered fixing the one my in-laws use... in the end I fitted another 6V battery and bought 6 months more time. Told them not to leave it plugged in all the time. Of course now it will die because of not being charged... Quote Link to comment Share on other sites More sharing options...
maxomill Posted August 2, 2018 Author Share Posted August 2, 2018 On 2018/06/01 at 12:40 PM, PJJ said: a cheap PWM 5-10A charger would probably be your best/cheapest bet ah but I need a local one any body know where to get them I also thought of a voltage regulator like the ones used for a usb (5.2 v is close to 6) but that would have no overcharge protection either maybe I will have to get from china cheers Quote Link to comment Share on other sites More sharing options...
maxomill Posted August 2, 2018 Author Share Posted August 2, 2018 On 2018/06/01 at 7:28 PM, plonkster said: The charging circuits in those things are horrible. Cheapest possible way to get it done, basically kills the battery in about 6 months if you leave it plugged in permanently. I briefly considered fixing the one my in-laws use... in the end I fitted another 6V battery and bought 6 months more time. Told them not to leave it plugged in all the time. Of course now it will die because of not being charged... maybe placing it in the off position with a timer that charges it for some time once or twice a week or month or something along those lines cheers ___ 1 Quote Link to comment Share on other sites More sharing options...
maxomill Posted August 2, 2018 Author Share Posted August 2, 2018 (edited) just found this http://www.elexco.co.za/index.php?route=product/product&product_id=829 anyone have experience with them big question is if the input changes does the output also change like when clouds come over will the output remain constant??? cheers Edited August 2, 2018 by maxomill duh Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted August 4, 2018 Share Posted August 4, 2018 On 2018/08/03 at 1:39 AM, maxomill said: just found this http://www.elexco.co.za/index.php?route=product/product&product_id=829 anyone have experience with them big question is if the input changes does the output also change like when clouds come over will the output remain constant??? cheers I use similar DC buck boosters and they're generally very stable, as long as the input is higher than the output. maxomill 1 Quote Link to comment Share on other sites More sharing options...
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