Some cars use electric pumps for brake assist, most probably those make great vacuum with tiny flow rate. On Tue, Oct 19, 2010 at 11:32 AM, wrote: >> > Perhaps you could test various >> > models from small battery operated to canister and up, until you > find >> > one that doesn't exceed the size limitation, yet gives you your 0.5 >> > atm. >> >> Ordinary vaccum cleaners don't generate anywhere near .5 atmosphere. > > But could be another way of driving a venturi. > -- > Scanned by iCritical. > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 KPL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .