Search found 3 matches

by holtt
Thu May 29, 2014 10:51 pm
Forum: General Discussion
Topic: Solar panel charger with auto shutoff. Solar LED drivers.
Replies: 54
Views: 135752

Re: Solar panel charger with auto shutoff. Solar LED drivers

PS

I'm a bit rusty on how circuits are annotated, but I'm a little confused on how both inductors are labled "0.47 mH", but are also labled "4R9" and "10R". Aren't these designations for two different inductor values as opposed to identical (0.47 mH)?
by holtt
Thu May 29, 2014 10:39 pm
Forum: General Discussion
Topic: Solar panel charger with auto shutoff. Solar LED drivers.
Replies: 54
Views: 135752

Re: Solar panel charger with auto shutoff. Solar LED drivers

Hey thanks for that reply and that circuit! I put it together and indeed it is a very simple and effective alternative to the toroidal coil approach. It's actually a very nice solution to my requirements of "easy to put together 100" and "works off old cast off AA batteries for a handful of days" In...
by holtt
Wed May 28, 2014 2:32 pm
Forum: General Discussion
Topic: Solar panel charger with auto shutoff. Solar LED drivers.
Replies: 54
Views: 135752

Re: Solar panel charger with auto shutoff. Solar LED drivers

Hi, glad I found this thread! I've been messing with the QX5252 the last week, making a nice little minimal Joule Thief-like setup. But I've run into one quandary, and wondered if any of you knew a way around it. As mentioned before, the chip will turn off the light when the voltage gets below 0.9 o...