Hi group
I bougt a toy in the US which is operated by a lippo cell. The wall wart that came along wiht it is obviousely a US version alas working with 110V whereas where I live we have 230V.
The wall wart output is rated DC 5.5V 280 mA and is definately only a transformer with a rectifier, a coil and an electrolytic capacitor to flatten out the DC hence unregulated.
It plugs into a little box which holds a cirquit acording to the drawing available on the website below.
From there the wire goes to the toy. I haven't opened the toy since it's difficult to do it without damaging it. I therefore don't know if before the lippo there is more cirquitry or if the box more or less directly connects to the lippo cell.
I'm aware that I have to replace the wall wart with a localized version and that I'm fine with one also outputing 5.5V DC @ at least
280mA. I do wonder however what above cirquit does (I figure sereves to cut the wall wart from the lipo once it's full?) and wether it would work to use a 6V wall wart instead cause this is what I would have as a spare one laying around. Getting a wall wart that outputs exactly 5.5V otherwise seems quite difficult. I also wonder wether it would be ok to use a wall wart outputing say 9V and then use a linear regulator and have it output 5.5V DC or if this could negatively affect the loading of the lippo cell. I'm asking cause I don't have much experience with lipo's and know that they can be dangerous if not treated well.TIA
Markus