Al salaam a'alaykum Bob

09 Nov 03 11:20, Bob Lawrence wrote to David Drummond:

 DD>> The three ICs you suggest use different frequencies. What is
 DD>> the advantage of going to the faster (or slower) frequencys? 

 BL>  Higher freq, smaller coil. 

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

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

 BL>  Like Brenton, I can do the sums and I'm probalby stupid enough to
 BL> actually build my own SMPS, but anyone with half a brain looks for 
 BL> the lazy way. Lazy is best, and it always works. Sometimes, you even
 BL> finish the project.

I could also get a small mains inverter and use the original 100-240V SMPS
- with the resultant inefficiency.

I'm trying to minimise battery load.

Regards,
David

--- Msged/LNX TE 06 (pre)