Martin Buehler wrote:
> btw: all these players need a 12v power supply for using
> 3.5" harddisks.
> i think it's not such a good idea to connect directly the
> car battery. i think it would be best to use rechargeable
> batteries (about 6 cells) which are loaded from the car's
> power supply, and then generate the 5v and 12v supply from
> these cells. this would also avoid interrupts when starting
> the engine. does anyone have a design for a 12v step-up
> converter accepting input voltage of 6-9volts?


   What's wrong with flyback converters working from a car
battery? For example LM3478 in a flyback mode.

Mike.

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