Al salaam a'alaykum Bob

16 Nov 03 09:50, Bob Lawrence wrote to David Drummond:

 BL>> Why don't you just buy a 6V battery? And trickle charge it off
 BL>> your 12V system with a 12V/5W light bulb?

 DD>> I don't know if it will run off straight 6V - I should test
 DD>> that....

 BL>  Of course it will! Unless I don't understand what you've got.

Well - it's not a VCR for a start. DVD players tend to have more
microprocessor stuff inside than a VCR (or should I say this thing appears
"smarter" than my VCR).

 DD>> I could also get a small mains inverter and use the original
 DD>> 100-240V SMPS - with the resultant inefficiency. I'm trying to
 DD>> minimise battery load.

 BL>  Jeeze! How many inverters do you have running this VCR?

The fewer, the better.

 BL>  I assumed that you had a standard VCR (that runs off 100-260V
 BL> 50/60Hz mains, and had bought (or had caught when it fell off the 
 BL> back of a truck) a 6.3V to 240V inverter. Does the VCR actually run off
 BL> 6.3V, directly? (probably with a regulator down to 5V) 

The DVD player was purchased from an electronics outlet - and came with the
240 to 6.3v switch-mode PSU. The power rating written on the bottom of the
player says: "6.3V 3A", same as the output of the PSU.

 BL>  *IF* you're using a 6.3V inverter, there is *another* possibility...
 BL> maybe your 6.3V inverter will run off 12V! You'd have to get a
 BL> circuit, but if it's a straight 6.3V to 240 AC inverter, it's almost
 BL> odds-on that it'll run perfectly well off 12V.

Dunno - the sticker on the underside of the PSU says: "Input 110-240V
~ 50-60Hz 1A", Output 6.3V 3A".

It made me think it needs the AC cycle.....

Regards,
David

--- Msged/LNX TE 06 (pre)