The basic reason for changing is the scarcity and cost of 6v parts / bulbs etc. and the ease which working on it at 12v will be in the future. I know that a DC-DC converter would be great but can I find one that would cope with that amperage - may be I'm not searching for the right thing. Anyone have an RS part no.? or jaycar/dicksmith/maplin ? The starter motor is 6v (although it does have a cranking handle too) but having put 24v through my 12v Sinclair C5 without issue I don't think that short burst usage wouldn't cause too many issues ? Cheers Chris -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Richard Prosser Sent: 19 August 2007 10:43 To: Microcontroller discussion list - Public. Subject: Re: [OT] Austin 7 Electrics 6v needs converting to 12v Hi Chris Basically a 6V-12V converter of the requisite power rating should be all that's required. Set the output volts to 14V or so and that should keep the battery topped up. Or run a 6V battery and power everything via the DC-DC. Even a simple push-pull converter may be enough. Presumably there is no starter motor (or card radio !) to worry about. My only concern would be the voltage regulator is likely to be pretty rudamentary and that you may get unexpected results dependent on how it reacts to a load that isn't consant voltage (e.g. a battery). Maybe the simplest DC-DC would work best as the load impedance (including the battery) would be reflected more in line with what the gererator is "expecting". But it would need to be setup carefully to prevent over or undercharging the battery. A simple charge-pump circuit uses capacitors to boost the voltage and tends to be limited in current a few 10's of mA. For this reason it is unlikely to be useable, but somthing using either a boost circuit or a transformer could be quite feasible - unless I've missed something. There's also a chance that by changing the regulator, he could get the existing generator to put out 12V although it probably wouldn't charge when idling (it possibly doesn't anyway). Just out of interest, why does he want to change it? RP On 19/08/07, pic@gavin-egan.com wrote: > Hi all > > A mate of mine here in NZ has an Austin 7 that runs 6v > > He's considering converting this to 12v. The generator presently > theoretically puts out up to 10a at 6v (if your lucky he says) > > He doesn't really want to go down the route or getting it rewound to 12v > unless absolutely necessary. So as you guys are much much cleverer than us, > we thought we'd throw the question open and ask if there is an EASY method > of converting the output of the generator to 12v.? (some form of charge pump > ?) > > After this is done - converting the rest of the electrics is fairly straight > forward but being partly Scottish he needs it to be cheap :) > > > > Your thoughts are appreciated > > Cheers > > Chris > NZ > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.0/960 - Release Date: 18/08/2007 15:48 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist