I'm waiting to get a sample. I understand it takes about 6W at 120VAC 60Hz. Harold > Any idea on the power level / onductance / resistance of the coil? > RP > > On 30/09/05, Rob Robson wrote: >> I'd be inclined to hang the pump off a variac to see how little AC >> amplitude >> you could get away with. Also, the pump's coil might not be too >> thrilled >> with square waves, so you might have to do what the cheaper commercial >> 12V-to-120VAC inverters do and simulate a sine wave with a two-step >> staircase. Just some thoughts. >> >> RR >> >> >> ----- Original Message ----- >> From: "Harold Hallikainen" >> To: "Microcontroller discussion list - Public." >> Sent: Thursday, September 29, 2005 4:10 PM >> Subject: Re: [EE] DC drive to aquarium diaphragm pump ideas? >> >> >> > >> >> .... >> >> >> >>> Any ideas? >> >> >> >> a small DC motor that you run at 60*60 RPM that moves a piston rod >> back >> >> and >> >> forth that physically toggles a switch between positive and negative >> >> voltage. >> >> >> >> - Marcel >> > >> > >> > Pretty elegant! Actually, if I had the DC motor, a crank on it could >> run >> > the diaphragm directly. Turns out this pump is incredibly cheap >> (cheaper >> > than a motor), so I'm trying to figure out a cleaver way to drive it.. >> > >> > Thanks for the ideas... Any more? >> > >> > THANKS! >> > >> > Harold >> > >> > >> > -- >> > FCC Rules Updated Daily at http://www.hallikainen.com >> > -- >> > 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 >> > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- FCC Rules Updated Daily at http://www.hallikainen.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist