Thanks for the replies so far
battery volt=5.4v
Ive seen a cct where there is a 2200 microfarad capacitor with the three lots of diodes in parallel with it but I'm not sure why-smoothing?.
The resultant dc o/p then needs regulating to 5.4v to charge the battery and I dont know how to regulate the voltage or the current never mind work out what components I need!
Can I use any diodes or do they have to be a specific type?Sorry for the questions but as i said its many years since I studied electronics and its a case of use it or lose it.