Yes, but many of the dirt cheap from China is pretty effecient. A linear charger is hardly effecient if I mean the same thing as you.
I just checked at www.biltema.se and 9 A charger for 30 USD, 5 A for 20 USD!
It's called "Batteriladdare" if you want to check, only in swedish though. I'm pretty sure you can get a decent charger in India.
I just checked at www.biltema.se and 9 A charger for 30 USD, 5 A for 20 USD!
It's called "Batteriladdare" if you want to check, only in swedish though. I'm pretty sure you can get a decent charger in India.
I'm experimenting with a 12V Lead-acid battery charger, for 20A. I can send the final schematic, when I'm finished. This is a constant current schematic, based on LM2574-ADJ. This is a 0.5A DIP-8 packaged device. I "boosted" the current with a 80A "cute" MOSFET 
After that I will have to make a 2-12 (of 2-15V) supply, for about 15A, for powering a few stepper motors. I don't know, how will I make that. Maybe I will use LM2574-ADJ, and some current-boost MOSFET, but this LMxxxx IC can operate only at a fixed, 52kHz frequency, so I will need quite big output choke.
After that I will have to make a 2-12 (of 2-15V) supply, for about 15A, for powering a few stepper motors. I don't know, how will I make that. Maybe I will use LM2574-ADJ, and some current-boost MOSFET, but this LMxxxx IC can operate only at a fixed, 52kHz frequency, so I will need quite big output choke.
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