Re: LF: OT, Remote site, garden progress, Solar battery charger

[DK7FC <73dk7fc@googlemail.com>]

Ah no, sorry, no mistake, it's all right...

73, Stefan

Am 27.09.2014 13:54, schrieb DK7FC:
> Sorry, there is a mistake in the circuit. I will update the image in 
> the evening.
> 73, Stefan
>
> Am 27.09.2014 00:51, schrieb DK7FC:
> > Hi all,
> >
> > Since today, my solar powered battery in the garden is charged by 
> > this solar battery charger, 
> > https://dl.dropboxusercontent.com/u/19882028/20140927_004153.jpg
> > It took some time until i found the circuit that suits my 
> > requirements. The losses are very low! The supply current of the 
> > circuit is just 40 uA!. The circuit is a comparator design which 
> > generates no QRM during ON and OFF times. The switching transients 
> > are relatively slow (not like in usual switch mode supplies). The 
> > hysteresis causes a switch-off voltage of 13.9V and a switch-on 
> > voltage of 13.3V. The high current diode which is a very low forward 
> > voltage drop is taken from an old SMPS...
> > Just in case someone want to play with similar stuff and likes to 
> > have some ideas...
> > 73, Stefan/DK7FC
> >
> > PS: Yes yes yes, of course the may be similar circuits in the web and 
> > someone has done it before. But it wasn't the goal to do something 
> > the first time, as usual :-)